21665475

素因数分解:

$3^4\times 5^2\times {\mathrm{13}}^1\times {\mathrm{823}}^1$

素因数の和:858

約数の個数: 60

約数和(自身を含む): 43271536

約数和(自身を除く): 21606061

約数列:

[1, 3, 5, 9, 13, 15, 25, 27, 39, 45, 65, 75, 81, 117, 135, 195, 225, 325, 351, 405, 585, 675, 823, 975, 1053, 1755, 2025, 2469, 2925, 4115, 5265, 7407, 8775, 10699, 12345, 20575, 22221, 26325, 32097, 37035, 53495, 61725, 66663, 96291, 111105, 160485, 185175, 267475, 288873, 333315, 481455, 555525, 802425, 866619, 1444365, 1666575, 2407275, 4333095, 7221825, 21665475]

約数ペア:

[(1, 21665475), (3, 7221825), (5, 4333095), (9, 2407275), (13, 1666575), (15, 1444365), (25, 866619), (27, 802425), (39, 555525), (45, 481455), (65, 333315), (75, 288873), (81, 267475), (117, 185175), (135, 160485), (195, 111105), (225, 96291), (325, 66663), (351, 61725), (405, 53495), (585, 37035), (675, 32097), (823, 26325), (975, 22221), (1053, 20575), (1755, 12345), (2025, 10699), (2469, 8775), (2925, 7407), (4115, 5265)]