20011420

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{6997}}^1$

素因数の和:7030

約数の個数: 48

約数和(自身を含む): 49377888

約数和(自身を除く): 29366468

約数列:

[1, 2, 4, 5, 10, 11, 13, 20, 22, 26, 44, 52, 55, 65, 110, 130, 143, 220, 260, 286, 572, 715, 1430, 2860, 6997, 13994, 27988, 34985, 69970, 76967, 90961, 139940, 153934, 181922, 307868, 363844, 384835, 454805, 769670, 909610, 1000571, 1539340, 1819220, 2001142, 4002284, 5002855, 10005710, 20011420]

約数ペア:

[(1, 20011420), (2, 10005710), (4, 5002855), (5, 4002284), (10, 2001142), (11, 1819220), (13, 1539340), (20, 1000571), (22, 909610), (26, 769670), (44, 454805), (52, 384835), (55, 363844), (65, 307868), (110, 181922), (130, 153934), (143, 139940), (220, 90961), (260, 76967), (286, 69970), (572, 34985), (715, 27988), (1430, 13994), (2860, 6997)]