78648020

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{389}}^1\times {\mathrm{919}}^1$

素因数の和:1328

約数の個数: 48

約数和(自身を含む): 180835200

約数和(自身を除く): 102187180

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 110, 220, 389, 778, 919, 1556, 1838, 1945, 3676, 3890, 4279, 4595, 7780, 8558, 9190, 10109, 17116, 18380, 20218, 21395, 40436, 42790, 50545, 85580, 101090, 202180, 357491, 714982, 1429964, 1787455, 3574910, 3932401, 7149820, 7864802, 15729604, 19662005, 39324010, 78648020]

約数ペア:

[(1, 78648020), (2, 39324010), (4, 19662005), (5, 15729604), (10, 7864802), (11, 7149820), (20, 3932401), (22, 3574910), (44, 1787455), (55, 1429964), (110, 714982), (220, 357491), (389, 202180), (778, 101090), (919, 85580), (1556, 50545), (1838, 42790), (1945, 40436), (3676, 21395), (3890, 20218), (4279, 18380), (4595, 17116), (7780, 10109), (8558, 9190)]