21738980

素因数分解:

$2^2\times 5^1\times {\mathrm{29}}^1\times {\mathrm{37}}^1\times {\mathrm{1013}}^1$

素因数の和:1088

約数の個数: 48

約数和(自身を含む): 48550320

約数和(自身を除く): 26811340

約数列:

[1, 2, 4, 5, 10, 20, 29, 37, 58, 74, 116, 145, 148, 185, 290, 370, 580, 740, 1013, 1073, 2026, 2146, 4052, 4292, 5065, 5365, 10130, 10730, 20260, 21460, 29377, 37481, 58754, 74962, 117508, 146885, 149924, 187405, 293770, 374810, 587540, 749620, 1086949, 2173898, 4347796, 5434745, 10869490, 21738980]

約数ペア:

[(1, 21738980), (2, 10869490), (4, 5434745), (5, 4347796), (10, 2173898), (20, 1086949), (29, 749620), (37, 587540), (58, 374810), (74, 293770), (116, 187405), (145, 149924), (148, 146885), (185, 117508), (290, 74962), (370, 58754), (580, 37481), (740, 29377), (1013, 21460), (1073, 20260), (2026, 10730), (2146, 10130), (4052, 5365), (4292, 5065)]