1285100

素因数分解:

$2^2\times 5^2\times {\mathrm{71}}^1\times {\mathrm{181}}^1$

素因数の和:266

約数の個数: 36

約数和(自身を含む): 2843568

約数和(自身を除く): 1558468

約数列:

[1, 2, 4, 5, 10, 20, 25, 50, 71, 100, 142, 181, 284, 355, 362, 710, 724, 905, 1420, 1775, 1810, 3550, 3620, 4525, 7100, 9050, 12851, 18100, 25702, 51404, 64255, 128510, 257020, 321275, 642550, 1285100]

約数ペア:

[(1, 1285100), (2, 642550), (4, 321275), (5, 257020), (10, 128510), (20, 64255), (25, 51404), (50, 25702), (71, 18100), (100, 12851), (142, 9050), (181, 7100), (284, 4525), (355, 3620), (362, 3550), (710, 1810), (724, 1775), (905, 1420)]