20808525

素因数分解:

$3^1\times 5^2\times {\mathrm{41}}^1\times {\mathrm{67}}^1\times {\mathrm{101}}^1$

素因数の和:222

約数の個数: 48

約数和(自身を含む): 36122688

約数和(自身を除く): 15314163

約数列:

[1, 3, 5, 15, 25, 41, 67, 75, 101, 123, 201, 205, 303, 335, 505, 615, 1005, 1025, 1515, 1675, 2525, 2747, 3075, 4141, 5025, 6767, 7575, 8241, 12423, 13735, 20301, 20705, 33835, 41205, 62115, 68675, 101505, 103525, 169175, 206025, 277447, 310575, 507525, 832341, 1387235, 4161705, 6936175, 20808525]

約数ペア:

[(1, 20808525), (3, 6936175), (5, 4161705), (15, 1387235), (25, 832341), (41, 507525), (67, 310575), (75, 277447), (101, 206025), (123, 169175), (201, 103525), (205, 101505), (303, 68675), (335, 62115), (505, 41205), (615, 33835), (1005, 20705), (1025, 20301), (1515, 13735), (1675, 12423), (2525, 8241), (2747, 7575), (3075, 6767), (4141, 5025)]