21131215240

素因数分解:

$2^3\times 5^1\times {\mathrm{109}}^1\times {\mathrm{307}}^1\times {\mathrm{15787}}^1$

素因数の和:16214

約数の個数: 64

約数和(自身を含む): 48140769600

約数和(自身を除く): 27009554360

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 109, 218, 307, 436, 545, 614, 872, 1090, 1228, 1535, 2180, 2456, 3070, 4360, 6140, 12280, 15787, 31574, 33463, 63148, 66926, 78935, 126296, 133852, 157870, 167315, 267704, 315740, 334630, 631480, 669260, 1338520, 1720783, 3441566, 4846609, 6883132, 8603915, 9693218, 13766264, 17207830, 19386436, 24233045, 34415660, 38772872, 48466090, 68831320, 96932180, 193864360, 528280381, 1056560762, 2113121524, 2641401905, 4226243048, 5282803810, 10565607620, 21131215240]

約数ペア:

[(1, 21131215240), (2, 10565607620), (4, 5282803810), (5, 4226243048), (8, 2641401905), (10, 2113121524), (20, 1056560762), (40, 528280381), (109, 193864360), (218, 96932180), (307, 68831320), (436, 48466090), (545, 38772872), (614, 34415660), (872, 24233045), (1090, 19386436), (1228, 17207830), (1535, 13766264), (2180, 9693218), (2456, 8603915), (3070, 6883132), (4360, 4846609), (6140, 3441566), (12280, 1720783), (15787, 1338520), (31574, 669260), (33463, 631480), (63148, 334630), (66926, 315740), (78935, 267704), (126296, 167315), (133852, 157870)]