20818125

素因数分解:

$3^2\times 5^4\times {\mathrm{3701}}^1$

素因数の和:3727

約数の個数: 30

約数和(自身を含む): 37586406

約数和(自身を除く): 16768281

約数列:

[1, 3, 5, 9, 15, 25, 45, 75, 125, 225, 375, 625, 1125, 1875, 3701, 5625, 11103, 18505, 33309, 55515, 92525, 166545, 277575, 462625, 832725, 1387875, 2313125, 4163625, 6939375, 20818125]

約数ペア:

[(1, 20818125), (3, 6939375), (5, 4163625), (9, 2313125), (15, 1387875), (25, 832725), (45, 462625), (75, 277575), (125, 166545), (225, 92525), (375, 55515), (625, 33309), (1125, 18505), (1875, 11103), (3701, 5625)]