21471280

素因数分解:

$2^4\times 5^1\times {\mathrm{59}}^1\times {\mathrm{4549}}^1$

素因数の和:4621

約数の個数: 40

約数和(自身を含む): 50778000

約数和(自身を除く): 29306720

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 59, 80, 118, 236, 295, 472, 590, 944, 1180, 2360, 4549, 4720, 9098, 18196, 22745, 36392, 45490, 72784, 90980, 181960, 268391, 363920, 536782, 1073564, 1341955, 2147128, 2683910, 4294256, 5367820, 10735640, 21471280]

約数ペア:

[(1, 21471280), (2, 10735640), (4, 5367820), (5, 4294256), (8, 2683910), (10, 2147128), (16, 1341955), (20, 1073564), (40, 536782), (59, 363920), (80, 268391), (118, 181960), (236, 90980), (295, 72784), (472, 45490), (590, 36392), (944, 22745), (1180, 18196), (2360, 9098), (4549, 4720)]