18981721840

素因数分解:

$2^4\times 5^1\times {\mathrm{79}}^1\times {\mathrm{101}}^1\times {\mathrm{131}}^1\times {\mathrm{227}}^1$

素因数の和:551

約数の個数: 160

約数和(自身を含む): 45678504960

約数和(自身を除く): 26696783120

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 79, 80, 101, 131, 158, 202, 227, 262, 316, 395, 404, 454, 505, 524, 632, 655, 790, 808, 908, 1010, 1048, 1135, 1264, 1310, 1580, 1616, 1816, 2020, 2096, 2270, 2620, 3160, 3632, 4040, 4540, 5240, 6320, 7979, 8080, 9080, 10349, 10480, 13231, 15958, 17933, 18160, 20698, 22927, 26462, 29737, 31916, 35866, 39895, 41396, 45854, 51745, 52924, 59474, 63832, 66155, 71732, 79790, 82792, 89665, 91708, 103490, 105848, 114635, 118948, 127664, 132310, 143464, 148685, 159580, 165584, 179330, 183416, 206980, 211696, 229270, 237896, 264620, 286928, 297370, 319160, 358660, 366832, 413960, 458540, 475792, 529240, 594740, 638320, 717320, 827920, 917080, 1045249, 1058480, 1189480, 1434640, 1811233, 1834160, 2090498, 2349223, 2378960, 3003437, 3622466, 4180996, 4698446, 5226245, 6006874, 7244932, 8361992, 9056165, 9396892, 10452490, 11746115, 12013748, 14489864, 15017185, 16723984, 18112330, 18793784, 20904980, 23492230, 24027496, 28979728, 30034370, 36224660, 37587568, 41809960, 46984460, 48054992, 60068740, 72449320, 83619920, 93968920, 120137480, 144898640, 187937840, 237271523, 240274960, 474543046, 949086092, 1186357615, 1898172184, 2372715230, 3796344368, 4745430460, 9490860920, 18981721840]

約数ペア:

[(1, 18981721840), (2, 9490860920), (4, 4745430460), (5, 3796344368), (8, 2372715230), (10, 1898172184), (16, 1186357615), (20, 949086092), (40, 474543046), (79, 240274960), (80, 237271523), (101, 187937840), (131, 144898640), (158, 120137480), (202, 93968920), (227, 83619920), (262, 72449320), (316, 60068740), (395, 48054992), (404, 46984460), (454, 41809960), (505, 37587568), (524, 36224660), (632, 30034370), (655, 28979728), (790, 24027496), (808, 23492230), (908, 20904980), (1010, 18793784), (1048, 18112330), (1135, 16723984), (1264, 15017185), (1310, 14489864), (1580, 12013748), (1616, 11746115), (1816, 10452490), (2020, 9396892), (2096, 9056165), (2270, 8361992), (2620, 7244932), (3160, 6006874), (3632, 5226245), (4040, 4698446), (4540, 4180996), (5240, 3622466), (6320, 3003437), (7979, 2378960), (8080, 2349223), (9080, 2090498), (10349, 1834160), (10480, 1811233), (13231, 1434640), (15958, 1189480), (17933, 1058480), (18160, 1045249), (20698, 917080), (22927, 827920), (26462, 717320), (29737, 638320), (31916, 594740), (35866, 529240), (39895, 475792), (41396, 458540), (45854, 413960), (51745, 366832), (52924, 358660), (59474, 319160), (63832, 297370), (66155, 286928), (71732, 264620), (79790, 237896), (82792, 229270), (89665, 211696), (91708, 206980), (103490, 183416), (105848, 179330), (114635, 165584), (118948, 159580), (127664, 148685), (132310, 143464)]