21613840

素因数分解:

$2^4\times 5^1\times {\mathrm{73}}^1\times {\mathrm{3701}}^1$

素因数の和:3787

約数の個数: 40

約数和(自身を含む): 50954328

約数和(自身を除く): 29340488

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 73, 80, 146, 292, 365, 584, 730, 1168, 1460, 2920, 3701, 5840, 7402, 14804, 18505, 29608, 37010, 59216, 74020, 148040, 270173, 296080, 540346, 1080692, 1350865, 2161384, 2701730, 4322768, 5403460, 10806920, 21613840]

約数ペア:

[(1, 21613840), (2, 10806920), (4, 5403460), (5, 4322768), (8, 2701730), (10, 2161384), (16, 1350865), (20, 1080692), (40, 540346), (73, 296080), (80, 270173), (146, 148040), (292, 74020), (365, 59216), (584, 37010), (730, 29608), (1168, 18505), (1460, 14804), (2920, 7402), (3701, 5840)]