720209680

素因数分解:

$2^4\times 5^1\times {\mathrm{9002621}}^1$

素因数の和:9002634

約数の個数: 20

約数和(自身を含む): 1674487692

約数和(自身を除く): 954278012

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 9002621, 18005242, 36010484, 45013105, 72020968, 90026210, 144041936, 180052420, 360104840, 720209680]

約数ペア:

[(1, 720209680), (2, 360104840), (4, 180052420), (5, 144041936), (8, 90026210), (10, 72020968), (16, 45013105), (20, 36010484), (40, 18005242), (80, 9002621)]