21481240

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{48821}}^1$

素因数の和:48843

約数の個数: 32

約数和(自身を含む): 52727760

約数和(自身を除く): 31246520

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 40, 44, 55, 88, 110, 220, 440, 48821, 97642, 195284, 244105, 390568, 488210, 537031, 976420, 1074062, 1952840, 2148124, 2685155, 4296248, 5370310, 10740620, 21481240]

約数ペア:

[(1, 21481240), (2, 10740620), (4, 5370310), (5, 4296248), (8, 2685155), (10, 2148124), (11, 1952840), (20, 1074062), (22, 976420), (40, 537031), (44, 488210), (55, 390568), (88, 244105), (110, 195284), (220, 97642), (440, 48821)]