28906940

素因数分解:

$2^2\times 5^1\times {\mathrm{71}}^1\times {\mathrm{20357}}^1$

素因数の和:20437

約数の個数: 24

約数和(自身を含む): 61562592

約数和(自身を除く): 32655652

約数列:

[1, 2, 4, 5, 10, 20, 71, 142, 284, 355, 710, 1420, 20357, 40714, 81428, 101785, 203570, 407140, 1445347, 2890694, 5781388, 7226735, 14453470, 28906940]

約数ペア:

[(1, 28906940), (2, 14453470), (4, 7226735), (5, 5781388), (10, 2890694), (20, 1445347), (71, 407140), (142, 203570), (284, 101785), (355, 81428), (710, 40714), (1420, 20357)]