21663125

素因数分解:

$5^4\times {\mathrm{11}}^1\times {\mathrm{23}}^1\times {\mathrm{137}}^1$

素因数の和:191

約数の個数: 40

約数和(自身を含む): 31040064

約数和(自身を除く): 9376939

約数列:

[1, 5, 11, 23, 25, 55, 115, 125, 137, 253, 275, 575, 625, 685, 1265, 1375, 1507, 2875, 3151, 3425, 6325, 6875, 7535, 14375, 15755, 17125, 31625, 34661, 37675, 78775, 85625, 158125, 173305, 188375, 393875, 866525, 941875, 1969375, 4332625, 21663125]

約数ペア:

[(1, 21663125), (5, 4332625), (11, 1969375), (23, 941875), (25, 866525), (55, 393875), (115, 188375), (125, 173305), (137, 158125), (253, 85625), (275, 78775), (575, 37675), (625, 34661), (685, 31625), (1265, 17125), (1375, 15755), (1507, 14375), (2875, 7535), (3151, 6875), (3425, 6325)]