21657320

素因数分解:

$2^3\times 5^1\times {\mathrm{17}}^1\times {\mathrm{31849}}^1$

素因数の和:31877

約数の個数: 32

約数和(自身を含む): 51597000

約数和(自身を除く): 29939680

約数列:

[1, 2, 4, 5, 8, 10, 17, 20, 34, 40, 68, 85, 136, 170, 340, 680, 31849, 63698, 127396, 159245, 254792, 318490, 541433, 636980, 1082866, 1273960, 2165732, 2707165, 4331464, 5414330, 10828660, 21657320]

約数ペア:

[(1, 21657320), (2, 10828660), (4, 5414330), (5, 4331464), (8, 2707165), (10, 2165732), (17, 1273960), (20, 1082866), (34, 636980), (40, 541433), (68, 318490), (85, 254792), (136, 159245), (170, 127396), (340, 63698), (680, 31849)]