21481680

素因数分解:

$2^4\times 3^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{79}}^1\times {\mathrm{103}}^1$

素因数の和:209

約数の個数: 160

約数和(自身を含む): 74280960

約数和(自身を除く): 52799280

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 11, 12, 15, 16, 20, 22, 24, 30, 33, 40, 44, 48, 55, 60, 66, 79, 80, 88, 103, 110, 120, 132, 158, 165, 176, 206, 220, 237, 240, 264, 309, 316, 330, 395, 412, 440, 474, 515, 528, 618, 632, 660, 790, 824, 869, 880, 948, 1030, 1133, 1185, 1236, 1264, 1320, 1545, 1580, 1648, 1738, 1896, 2060, 2266, 2370, 2472, 2607, 2640, 3090, 3160, 3399, 3476, 3792, 4120, 4345, 4532, 4740, 4944, 5214, 5665, 6180, 6320, 6798, 6952, 8137, 8240, 8690, 9064, 9480, 10428, 11330, 12360, 13035, 13596, 13904, 16274, 16995, 17380, 18128, 18960, 20856, 22660, 24411, 24720, 26070, 27192, 32548, 33990, 34760, 40685, 41712, 45320, 48822, 52140, 54384, 65096, 67980, 69520, 81370, 89507, 90640, 97644, 104280, 122055, 130192, 135960, 162740, 179014, 195288, 208560, 244110, 268521, 271920, 325480, 358028, 390576, 447535, 488220, 537042, 650960, 716056, 895070, 976440, 1074084, 1342605, 1432112, 1790140, 1952880, 2148168, 2685210, 3580280, 4296336, 5370420, 7160560, 10740840, 21481680]

約数ペア:

[(1, 21481680), (2, 10740840), (3, 7160560), (4, 5370420), (5, 4296336), (6, 3580280), (8, 2685210), (10, 2148168), (11, 1952880), (12, 1790140), (15, 1432112), (16, 1342605), (20, 1074084), (22, 976440), (24, 895070), (30, 716056), (33, 650960), (40, 537042), (44, 488220), (48, 447535), (55, 390576), (60, 358028), (66, 325480), (79, 271920), (80, 268521), (88, 244110), (103, 208560), (110, 195288), (120, 179014), (132, 162740), (158, 135960), (165, 130192), (176, 122055), (206, 104280), (220, 97644), (237, 90640), (240, 89507), (264, 81370), (309, 69520), (316, 67980), (330, 65096), (395, 54384), (412, 52140), (440, 48822), (474, 45320), (515, 41712), (528, 40685), (618, 34760), (632, 33990), (660, 32548), (790, 27192), (824, 26070), (869, 24720), (880, 24411), (948, 22660), (1030, 20856), (1133, 18960), (1185, 18128), (1236, 17380), (1264, 16995), (1320, 16274), (1545, 13904), (1580, 13596), (1648, 13035), (1738, 12360), (1896, 11330), (2060, 10428), (2266, 9480), (2370, 9064), (2472, 8690), (2607, 8240), (2640, 8137), (3090, 6952), (3160, 6798), (3399, 6320), (3476, 6180), (3792, 5665), (4120, 5214), (4345, 4944), (4532, 4740)]