21059145

素因数分解:

$3^2\times 5^1\times {\mathrm{23}}^1\times {\mathrm{20347}}^1$

素因数の和:20381

約数の個数: 24

約数和(自身を含む): 38091456

約数和(自身を除く): 17032311

約数列:

[1, 3, 5, 9, 15, 23, 45, 69, 115, 207, 345, 1035, 20347, 61041, 101735, 183123, 305205, 467981, 915615, 1403943, 2339905, 4211829, 7019715, 21059145]

約数ペア:

[(1, 21059145), (3, 7019715), (5, 4211829), (9, 2339905), (15, 1403943), (23, 915615), (45, 467981), (69, 305205), (115, 183123), (207, 101735), (345, 61041), (1035, 20347)]