21219240

素因数分解:

$2^3\times 3^1\times 5^1\times 7^1\times {\mathrm{25261}}^1$

素因数の和:25282

約数の個数: 64

約数和(自身を含む): 72754560

約数和(自身を除く): 51535320

約数列:

[1, 2, 3, 4, 5, 6, 7, 8, 10, 12, 14, 15, 20, 21, 24, 28, 30, 35, 40, 42, 56, 60, 70, 84, 105, 120, 140, 168, 210, 280, 420, 840, 25261, 50522, 75783, 101044, 126305, 151566, 176827, 202088, 252610, 303132, 353654, 378915, 505220, 530481, 606264, 707308, 757830, 884135, 1010440, 1060962, 1414616, 1515660, 1768270, 2121924, 2652405, 3031320, 3536540, 4243848, 5304810, 7073080, 10609620, 21219240]

約数ペア:

[(1, 21219240), (2, 10609620), (3, 7073080), (4, 5304810), (5, 4243848), (6, 3536540), (7, 3031320), (8, 2652405), (10, 2121924), (12, 1768270), (14, 1515660), (15, 1414616), (20, 1060962), (21, 1010440), (24, 884135), (28, 757830), (30, 707308), (35, 606264), (40, 530481), (42, 505220), (56, 378915), (60, 353654), (70, 303132), (84, 252610), (105, 202088), (120, 176827), (140, 151566), (168, 126305), (210, 101044), (280, 75783), (420, 50522), (840, 25261)]