18921170020

素因数分解:

$2^2\times 5^1\times {\mathrm{2971}}^1\times {\mathrm{318431}}^1$

素因数の和:321411

約数の個数: 24

約数和(自身を含む): 39747955968

約数和(自身を除く): 20826785948

約数列:

[1, 2, 4, 5, 10, 20, 2971, 5942, 11884, 14855, 29710, 59420, 318431, 636862, 1273724, 1592155, 3184310, 6368620, 946058501, 1892117002, 3784234004, 4730292505, 9460585010, 18921170020]

約数ペア:

[(1, 18921170020), (2, 9460585010), (4, 4730292505), (5, 3784234004), (10, 1892117002), (20, 946058501), (2971, 6368620), (5942, 3184310), (11884, 1592155), (14855, 1273724), (29710, 636862), (59420, 318431)]