21280635

素因数分解:

$3^2\times 5^1\times {\mathrm{23}}^1\times {\mathrm{29}}^1\times {\mathrm{709}}^1$

素因数の和:772

約数の個数: 48

約数和(自身を含む): 39873600

約数和(自身を除く): 18592965

約数列:

[1, 3, 5, 9, 15, 23, 29, 45, 69, 87, 115, 145, 207, 261, 345, 435, 667, 709, 1035, 1305, 2001, 2127, 3335, 3545, 6003, 6381, 10005, 10635, 16307, 20561, 30015, 31905, 48921, 61683, 81535, 102805, 146763, 185049, 244605, 308415, 472903, 733815, 925245, 1418709, 2364515, 4256127, 7093545, 21280635]

約数ペア:

[(1, 21280635), (3, 7093545), (5, 4256127), (9, 2364515), (15, 1418709), (23, 925245), (29, 733815), (45, 472903), (69, 308415), (87, 244605), (115, 185049), (145, 146763), (207, 102805), (261, 81535), (345, 61683), (435, 48921), (667, 31905), (709, 30015), (1035, 20561), (1305, 16307), (2001, 10635), (2127, 10005), (3335, 6381), (3545, 6003)]