21286725

素因数分解:

$3^1\times 5^2\times {\mathrm{29}}^1\times {\mathrm{9787}}^1$

素因数の和:9829

約数の個数: 24

約数和(自身を含む): 36411360

約数和(自身を除く): 15124635

約数列:

[1, 3, 5, 15, 25, 29, 75, 87, 145, 435, 725, 2175, 9787, 29361, 48935, 146805, 244675, 283823, 734025, 851469, 1419115, 4257345, 7095575, 21286725]

約数ペア:

[(1, 21286725), (3, 7095575), (5, 4257345), (15, 1419115), (25, 851469), (29, 734025), (75, 283823), (87, 244675), (145, 146805), (435, 48935), (725, 29361), (2175, 9787)]