8138020

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{71}}^1\times {\mathrm{521}}^1$

素因数の和:612

約数の個数: 48

約数和(自身を含む): 18942336

約数和(自身を除く): 10804316

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 71, 110, 142, 220, 284, 355, 521, 710, 781, 1042, 1420, 1562, 2084, 2605, 3124, 3905, 5210, 5731, 7810, 10420, 11462, 15620, 22924, 28655, 36991, 57310, 73982, 114620, 147964, 184955, 369910, 406901, 739820, 813802, 1627604, 2034505, 4069010, 8138020]

約数ペア:

[(1, 8138020), (2, 4069010), (4, 2034505), (5, 1627604), (10, 813802), (11, 739820), (20, 406901), (22, 369910), (44, 184955), (55, 147964), (71, 114620), (110, 73982), (142, 57310), (220, 36991), (284, 28655), (355, 22924), (521, 15620), (710, 11462), (781, 10420), (1042, 7810), (1420, 5731), (1562, 5210), (2084, 3905), (2605, 3124)]