21591625

素因数分解:

$5^3\times {\mathrm{11}}^1\times {\mathrm{41}}^1\times {\mathrm{383}}^1$

素因数の和:450

約数の個数: 32

約数和(自身を含む): 30191616

約数和(自身を除く): 8599991

約数列:

[1, 5, 11, 25, 41, 55, 125, 205, 275, 383, 451, 1025, 1375, 1915, 2255, 4213, 5125, 9575, 11275, 15703, 21065, 47875, 56375, 78515, 105325, 172733, 392575, 526625, 863665, 1962875, 4318325, 21591625]

約数ペア:

[(1, 21591625), (5, 4318325), (11, 1962875), (25, 863665), (41, 526625), (55, 392575), (125, 172733), (205, 105325), (275, 78515), (383, 56375), (451, 47875), (1025, 21065), (1375, 15703), (1915, 11275), (2255, 9575), (4213, 5125)]