217341640

素因数分解:

$2^3\times 5^1\times {\mathrm{79}}^1\times {\mathrm{109}}^1\times {\mathrm{631}}^1$

素因数の和:830

約数の個数: 64

約数和(自身を含む): 500544000

約数和(自身を除く): 283202360

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 79, 109, 158, 218, 316, 395, 436, 545, 631, 632, 790, 872, 1090, 1262, 1580, 2180, 2524, 3155, 3160, 4360, 5048, 6310, 8611, 12620, 17222, 25240, 34444, 43055, 49849, 68779, 68888, 86110, 99698, 137558, 172220, 199396, 249245, 275116, 343895, 344440, 398792, 498490, 550232, 687790, 996980, 1375580, 1993960, 2751160, 5433541, 10867082, 21734164, 27167705, 43468328, 54335410, 108670820, 217341640]

約数ペア:

[(1, 217341640), (2, 108670820), (4, 54335410), (5, 43468328), (8, 27167705), (10, 21734164), (20, 10867082), (40, 5433541), (79, 2751160), (109, 1993960), (158, 1375580), (218, 996980), (316, 687790), (395, 550232), (436, 498490), (545, 398792), (631, 344440), (632, 343895), (790, 275116), (872, 249245), (1090, 199396), (1262, 172220), (1580, 137558), (2180, 99698), (2524, 86110), (3155, 68888), (3160, 68779), (4360, 49849), (5048, 43055), (6310, 34444), (8611, 25240), (12620, 17222)]