21491840

素因数分解:

$2^7\times 5^1\times {\mathrm{33581}}^1$

素因数の和:33600

約数の個数: 32

約数和(自身を含む): 51380460

約数和(自身を除く): 29888620

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 160, 320, 640, 33581, 67162, 134324, 167905, 268648, 335810, 537296, 671620, 1074592, 1343240, 2149184, 2686480, 4298368, 5372960, 10745920, 21491840]

約数ペア:

[(1, 21491840), (2, 10745920), (4, 5372960), (5, 4298368), (8, 2686480), (10, 2149184), (16, 1343240), (20, 1074592), (32, 671620), (40, 537296), (64, 335810), (80, 268648), (128, 167905), (160, 134324), (320, 67162), (640, 33581)]