21470320

素因数分解:

$2^4\times 5^1\times {\mathrm{17}}^1\times {\mathrm{15787}}^1$

素因数の和:15817

約数の個数: 40

約数和(自身を含む): 52858224

約数和(自身を除く): 31387904

約数列:

[1, 2, 4, 5, 8, 10, 16, 17, 20, 34, 40, 68, 80, 85, 136, 170, 272, 340, 680, 1360, 15787, 31574, 63148, 78935, 126296, 157870, 252592, 268379, 315740, 536758, 631480, 1073516, 1262960, 1341895, 2147032, 2683790, 4294064, 5367580, 10735160, 21470320]

約数ペア:

[(1, 21470320), (2, 10735160), (4, 5367580), (5, 4294064), (8, 2683790), (10, 2147032), (16, 1341895), (17, 1262960), (20, 1073516), (34, 631480), (40, 536758), (68, 315740), (80, 268379), (85, 252592), (136, 157870), (170, 126296), (272, 78935), (340, 63148), (680, 31574), (1360, 15787)]