20525625

素因数分解:

$3^2\times 5^4\times {\mathrm{41}}^1\times {\mathrm{89}}^1$

素因数の和:156

約数の個数: 60

約数和(自身を含む): 38378340

約数和(自身を除く): 17852715

約数列:

[1, 3, 5, 9, 15, 25, 41, 45, 75, 89, 123, 125, 205, 225, 267, 369, 375, 445, 615, 625, 801, 1025, 1125, 1335, 1845, 1875, 2225, 3075, 3649, 4005, 5125, 5625, 6675, 9225, 10947, 11125, 15375, 18245, 20025, 25625, 32841, 33375, 46125, 54735, 55625, 76875, 91225, 100125, 164205, 166875, 230625, 273675, 456125, 500625, 821025, 1368375, 2280625, 4105125, 6841875, 20525625]

約数ペア:

[(1, 20525625), (3, 6841875), (5, 4105125), (9, 2280625), (15, 1368375), (25, 821025), (41, 500625), (45, 456125), (75, 273675), (89, 230625), (123, 166875), (125, 164205), (205, 100125), (225, 91225), (267, 76875), (369, 55625), (375, 54735), (445, 46125), (615, 33375), (625, 32841), (801, 25625), (1025, 20025), (1125, 18245), (1335, 15375), (1845, 11125), (1875, 10947), (2225, 9225), (3075, 6675), (3649, 5625), (4005, 5125)]