21511620

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{29}}^1\times {\mathrm{317}}^1$

素因数の和:374

約数の個数: 144

約数和(自身を含む): 72923760

約数和(自身を除く): 51412140

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 13, 15, 18, 20, 26, 29, 30, 36, 39, 45, 52, 58, 60, 65, 78, 87, 90, 116, 117, 130, 145, 156, 174, 180, 195, 234, 260, 261, 290, 317, 348, 377, 390, 435, 468, 522, 580, 585, 634, 754, 780, 870, 951, 1044, 1131, 1170, 1268, 1305, 1508, 1585, 1740, 1885, 1902, 2262, 2340, 2610, 2853, 3170, 3393, 3770, 3804, 4121, 4524, 4755, 5220, 5655, 5706, 6340, 6786, 7540, 8242, 9193, 9510, 11310, 11412, 12363, 13572, 14265, 16484, 16965, 18386, 19020, 20605, 22620, 24726, 27579, 28530, 33930, 36772, 37089, 41210, 45965, 49452, 55158, 57060, 61815, 67860, 74178, 82420, 82737, 91930, 110316, 119509, 123630, 137895, 148356, 165474, 183860, 185445, 239018, 247260, 275790, 330948, 358527, 370890, 413685, 478036, 551580, 597545, 717054, 741780, 827370, 1075581, 1195090, 1434108, 1654740, 1792635, 2151162, 2390180, 3585270, 4302324, 5377905, 7170540, 10755810, 21511620]

約数ペア:

[(1, 21511620), (2, 10755810), (3, 7170540), (4, 5377905), (5, 4302324), (6, 3585270), (9, 2390180), (10, 2151162), (12, 1792635), (13, 1654740), (15, 1434108), (18, 1195090), (20, 1075581), (26, 827370), (29, 741780), (30, 717054), (36, 597545), (39, 551580), (45, 478036), (52, 413685), (58, 370890), (60, 358527), (65, 330948), (78, 275790), (87, 247260), (90, 239018), (116, 185445), (117, 183860), (130, 165474), (145, 148356), (156, 137895), (174, 123630), (180, 119509), (195, 110316), (234, 91930), (260, 82737), (261, 82420), (290, 74178), (317, 67860), (348, 61815), (377, 57060), (390, 55158), (435, 49452), (468, 45965), (522, 41210), (580, 37089), (585, 36772), (634, 33930), (754, 28530), (780, 27579), (870, 24726), (951, 22620), (1044, 20605), (1131, 19020), (1170, 18386), (1268, 16965), (1305, 16484), (1508, 14265), (1585, 13572), (1740, 12363), (1885, 11412), (1902, 11310), (2262, 9510), (2340, 9193), (2610, 8242), (2853, 7540), (3170, 6786), (3393, 6340), (3770, 5706), (3804, 5655), (4121, 5220), (4524, 4755)]