21890580

素因数分解:

$2^2\times 3^1\times 5^1\times {\mathrm{397}}^1\times {\mathrm{919}}^1$

素因数の和:1328

約数の個数: 48

約数和(自身を含む): 61514880

約数和(自身を除く): 39624300

約数列:

[1, 2, 3, 4, 5, 6, 10, 12, 15, 20, 30, 60, 397, 794, 919, 1191, 1588, 1838, 1985, 2382, 2757, 3676, 3970, 4595, 4764, 5514, 5955, 7940, 9190, 11028, 11910, 13785, 18380, 23820, 27570, 55140, 364843, 729686, 1094529, 1459372, 1824215, 2189058, 3648430, 4378116, 5472645, 7296860, 10945290, 21890580]

約数ペア:

[(1, 21890580), (2, 10945290), (3, 7296860), (4, 5472645), (5, 4378116), (6, 3648430), (10, 2189058), (12, 1824215), (15, 1459372), (20, 1094529), (30, 729686), (60, 364843), (397, 55140), (794, 27570), (919, 23820), (1191, 18380), (1588, 13785), (1838, 11910), (1985, 11028), (2382, 9190), (2757, 7940), (3676, 5955), (3970, 5514), (4595, 4764)]