19908020

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{5323}}^1$

素因数の和:5360

約数の個数: 48

約数和(自身を含む): 48299328

約数和(自身を除く): 28391308

約数列:

[1, 2, 4, 5, 10, 11, 17, 20, 22, 34, 44, 55, 68, 85, 110, 170, 187, 220, 340, 374, 748, 935, 1870, 3740, 5323, 10646, 21292, 26615, 53230, 58553, 90491, 106460, 117106, 180982, 234212, 292765, 361964, 452455, 585530, 904910, 995401, 1171060, 1809820, 1990802, 3981604, 4977005, 9954010, 19908020]

約数ペア:

[(1, 19908020), (2, 9954010), (4, 4977005), (5, 3981604), (10, 1990802), (11, 1809820), (17, 1171060), (20, 995401), (22, 904910), (34, 585530), (44, 452455), (55, 361964), (68, 292765), (85, 234212), (110, 180982), (170, 117106), (187, 106460), (220, 90491), (340, 58553), (374, 53230), (748, 26615), (935, 21292), (1870, 10646), (3740, 5323)]