21656840

素因数分解:

$2^3\times 5^1\times {\mathrm{37}}^1\times {\mathrm{14633}}^1$

素因数の和:14681

約数の個数: 32

約数和(自身を含む): 50048280

約数和(自身を除く): 28391440

約数列:

[1, 2, 4, 5, 8, 10, 20, 37, 40, 74, 148, 185, 296, 370, 740, 1480, 14633, 29266, 58532, 73165, 117064, 146330, 292660, 541421, 585320, 1082842, 2165684, 2707105, 4331368, 5414210, 10828420, 21656840]

約数ペア:

[(1, 21656840), (2, 10828420), (4, 5414210), (5, 4331368), (8, 2707105), (10, 2165684), (20, 1082842), (37, 585320), (40, 541421), (74, 292660), (148, 146330), (185, 117064), (296, 73165), (370, 58532), (740, 29266), (1480, 14633)]