21605175

素因数分解:

$3^2\times 5^2\times {\mathrm{131}}^1\times {\mathrm{733}}^1$

素因数の和:880

約数の個数: 36

約数和(自身を含む): 39045864

約数和(自身を除く): 17440689

約数列:

[1, 3, 5, 9, 15, 25, 45, 75, 131, 225, 393, 655, 733, 1179, 1965, 2199, 3275, 3665, 5895, 6597, 9825, 10995, 18325, 29475, 32985, 54975, 96023, 164925, 288069, 480115, 864207, 1440345, 2400575, 4321035, 7201725, 21605175]

約数ペア:

[(1, 21605175), (3, 7201725), (5, 4321035), (9, 2400575), (15, 1440345), (25, 864207), (45, 480115), (75, 288069), (131, 164925), (225, 96023), (393, 54975), (655, 32985), (733, 29475), (1179, 18325), (1965, 10995), (2199, 9825), (3275, 6597), (3665, 5895)]