20405810

素因数分解:

$2^1\times 5^1\times {\mathrm{19}}^1\times {\mathrm{211}}^1\times {\mathrm{509}}^1$

素因数の和:746

約数の個数: 32

約数和(自身を含む): 38923200

約数和(自身を除く): 18517390

約数列:

[1, 2, 5, 10, 19, 38, 95, 190, 211, 422, 509, 1018, 1055, 2110, 2545, 4009, 5090, 8018, 9671, 19342, 20045, 40090, 48355, 96710, 107399, 214798, 536995, 1073990, 2040581, 4081162, 10202905, 20405810]

約数ペア:

[(1, 20405810), (2, 10202905), (5, 4081162), (10, 2040581), (19, 1073990), (38, 536995), (95, 214798), (190, 107399), (211, 96710), (422, 48355), (509, 40090), (1018, 20045), (1055, 19342), (2110, 9671), (2545, 8018), (4009, 5090)]