21615975

素因数分解:

$3^2\times 5^2\times {\mathrm{23}}^1\times {\mathrm{4177}}^1$

素因数の和:4216

約数の個数: 36

約数和(自身を含む): 40409616

約数和(自身を除く): 18793641

約数列:

[1, 3, 5, 9, 15, 23, 25, 45, 69, 75, 115, 207, 225, 345, 575, 1035, 1725, 4177, 5175, 12531, 20885, 37593, 62655, 96071, 104425, 187965, 288213, 313275, 480355, 864639, 939825, 1441065, 2401775, 4323195, 7205325, 21615975]

約数ペア:

[(1, 21615975), (3, 7205325), (5, 4323195), (9, 2401775), (15, 1441065), (23, 939825), (25, 864639), (45, 480355), (69, 313275), (75, 288213), (115, 187965), (207, 104425), (225, 96071), (345, 62655), (575, 37593), (1035, 20885), (1725, 12531), (4177, 5175)]