20921375

素因数分解:

$5^3\times {\mathrm{19}}^1\times {\mathrm{23}}^1\times {\mathrm{383}}^1$

素因数の和:440

約数の個数: 32

約数和(自身を含む): 28753920

約数和(自身を除く): 7832545

約数列:

[1, 5, 19, 23, 25, 95, 115, 125, 383, 437, 475, 575, 1915, 2185, 2375, 2875, 7277, 8809, 9575, 10925, 36385, 44045, 47875, 54625, 167371, 181925, 220225, 836855, 909625, 1101125, 4184275, 20921375]

約数ペア:

[(1, 20921375), (5, 4184275), (19, 1101125), (23, 909625), (25, 836855), (95, 220225), (115, 181925), (125, 167371), (383, 54625), (437, 47875), (475, 44045), (575, 36385), (1915, 10925), (2185, 9575), (2375, 8809), (2875, 7277)]