20928570

素因数分解:

$2^1\times 3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{103}}^1\times {\mathrm{521}}^1$

素因数の和:647

約数の個数: 64

約数和(自身を含む): 54722304

約数和(自身を除く): 33793734

約数列:

[1, 2, 3, 5, 6, 10, 13, 15, 26, 30, 39, 65, 78, 103, 130, 195, 206, 309, 390, 515, 521, 618, 1030, 1042, 1339, 1545, 1563, 2605, 2678, 3090, 3126, 4017, 5210, 6695, 6773, 7815, 8034, 13390, 13546, 15630, 20085, 20319, 33865, 40170, 40638, 53663, 67730, 101595, 107326, 160989, 203190, 268315, 321978, 536630, 697619, 804945, 1395238, 1609890, 2092857, 3488095, 4185714, 6976190, 10464285, 20928570]

約数ペア:

[(1, 20928570), (2, 10464285), (3, 6976190), (5, 4185714), (6, 3488095), (10, 2092857), (13, 1609890), (15, 1395238), (26, 804945), (30, 697619), (39, 536630), (65, 321978), (78, 268315), (103, 203190), (130, 160989), (195, 107326), (206, 101595), (309, 67730), (390, 53663), (515, 40638), (521, 40170), (618, 33865), (1030, 20319), (1042, 20085), (1339, 15630), (1545, 13546), (1563, 13390), (2605, 8034), (2678, 7815), (3090, 6773), (3126, 6695), (4017, 5210)]