21783620

素因数分解:

$2^2\times 5^1\times {\mathrm{269}}^1\times {\mathrm{4049}}^1$

素因数の和:4327

約数の個数: 24

約数和(自身を含む): 45927000

約数和(自身を除く): 24143380

約数列:

[1, 2, 4, 5, 10, 20, 269, 538, 1076, 1345, 2690, 4049, 5380, 8098, 16196, 20245, 40490, 80980, 1089181, 2178362, 4356724, 5445905, 10891810, 21783620]

約数ペア:

[(1, 21783620), (2, 10891810), (4, 5445905), (5, 4356724), (10, 2178362), (20, 1089181), (269, 80980), (538, 40490), (1076, 20245), (1345, 16196), (2690, 8098), (4049, 5380)]