20280715

素因数分解:

$5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{29}}^2\times {\mathrm{53}}^1$

素因数の和:136

約数の個数: 48

約数和(自身を含む): 31606848

約数和(自身を除く): 11326133

約数列:

[1, 5, 7, 13, 29, 35, 53, 65, 91, 145, 203, 265, 371, 377, 455, 689, 841, 1015, 1537, 1855, 1885, 2639, 3445, 4205, 4823, 5887, 7685, 10759, 10933, 13195, 19981, 24115, 29435, 44573, 53795, 54665, 76531, 99905, 139867, 222865, 312011, 382655, 579449, 699335, 1560055, 2897245, 4056143, 20280715]

約数ペア:

[(1, 20280715), (5, 4056143), (7, 2897245), (13, 1560055), (29, 699335), (35, 579449), (53, 382655), (65, 312011), (91, 222865), (145, 139867), (203, 99905), (265, 76531), (371, 54665), (377, 53795), (455, 44573), (689, 29435), (841, 24115), (1015, 19981), (1537, 13195), (1855, 10933), (1885, 10759), (2639, 7685), (3445, 5887), (4205, 4823)]