20643675

素因数分解:

$3^1\times 5^2\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{683}}^1$

素因数の和:740

約数の個数: 48

約数和(自身を含む): 37997568

約数和(自身を除く): 17353893

約数列:

[1, 3, 5, 13, 15, 25, 31, 39, 65, 75, 93, 155, 195, 325, 403, 465, 683, 775, 975, 1209, 2015, 2049, 2325, 3415, 6045, 8879, 10075, 10245, 17075, 21173, 26637, 30225, 44395, 51225, 63519, 105865, 133185, 221975, 275249, 317595, 529325, 665925, 825747, 1376245, 1587975, 4128735, 6881225, 20643675]

約数ペア:

[(1, 20643675), (3, 6881225), (5, 4128735), (13, 1587975), (15, 1376245), (25, 825747), (31, 665925), (39, 529325), (65, 317595), (75, 275249), (93, 221975), (155, 133185), (195, 105865), (325, 63519), (403, 51225), (465, 44395), (683, 30225), (775, 26637), (975, 21173), (1209, 17075), (2015, 10245), (2049, 10075), (2325, 8879), (3415, 6045)]