20978576

素因数分解:

$2^4\times {\mathrm{23}}^1\times {\mathrm{109}}^1\times {\mathrm{523}}^1$

素因数の和:663

約数の個数: 40

約数和(自身を含む): 42884160

約数和(自身を除く): 21905584

約数列:

[1, 2, 4, 8, 16, 23, 46, 92, 109, 184, 218, 368, 436, 523, 872, 1046, 1744, 2092, 2507, 4184, 5014, 8368, 10028, 12029, 20056, 24058, 40112, 48116, 57007, 96232, 114014, 192464, 228028, 456056, 912112, 1311161, 2622322, 5244644, 10489288, 20978576]

約数ペア:

[(1, 20978576), (2, 10489288), (4, 5244644), (8, 2622322), (16, 1311161), (23, 912112), (46, 456056), (92, 228028), (109, 192464), (184, 114014), (218, 96232), (368, 57007), (436, 48116), (523, 40112), (872, 24058), (1046, 20056), (1744, 12029), (2092, 10028), (2507, 8368), (4184, 5014)]