20290120

素因数分解:

$2^3\times 5^1\times {\mathrm{31}}^1\times {\mathrm{16363}}^1$

素因数の和:16405

約数の個数: 32

約数和(自身を含む): 47128320

約数和(自身を除く): 26838200

約数列:

[1, 2, 4, 5, 8, 10, 20, 31, 40, 62, 124, 155, 248, 310, 620, 1240, 16363, 32726, 65452, 81815, 130904, 163630, 327260, 507253, 654520, 1014506, 2029012, 2536265, 4058024, 5072530, 10145060, 20290120]

約数ペア:

[(1, 20290120), (2, 10145060), (4, 5072530), (5, 4058024), (8, 2536265), (10, 2029012), (20, 1014506), (31, 654520), (40, 507253), (62, 327260), (124, 163630), (155, 130904), (248, 81815), (310, 65452), (620, 32726), (1240, 16363)]