21290540

素因数分解:

$2^2\times 5^1\times {\mathrm{37}}^1\times {\mathrm{28771}}^1$

素因数の和:28817

約数の個数: 24

約数和(自身を含む): 45920112

約数和(自身を除く): 24629572

約数列:

[1, 2, 4, 5, 10, 20, 37, 74, 148, 185, 370, 740, 28771, 57542, 115084, 143855, 287710, 575420, 1064527, 2129054, 4258108, 5322635, 10645270, 21290540]

約数ペア:

[(1, 21290540), (2, 10645270), (4, 5322635), (5, 4258108), (10, 2129054), (20, 1064527), (37, 575420), (74, 287710), (148, 143855), (185, 115084), (370, 57542), (740, 28771)]