668166340

素因数分解:

$2^2\times 5^1\times {\mathrm{41}}^1\times {\mathrm{163}}^1\times {\mathrm{4999}}^1$

素因数の和:5212

約数の個数: 48

約数和(自身を含む): 1446480000

約数和(自身を除く): 778313660

約数列:

[1, 2, 4, 5, 10, 20, 41, 82, 163, 164, 205, 326, 410, 652, 815, 820, 1630, 3260, 4999, 6683, 9998, 13366, 19996, 24995, 26732, 33415, 49990, 66830, 99980, 133660, 204959, 409918, 814837, 819836, 1024795, 1629674, 2049590, 3259348, 4074185, 4099180, 8148370, 16296740, 33408317, 66816634, 133633268, 167041585, 334083170, 668166340]

約数ペア:

[(1, 668166340), (2, 334083170), (4, 167041585), (5, 133633268), (10, 66816634), (20, 33408317), (41, 16296740), (82, 8148370), (163, 4099180), (164, 4074185), (205, 3259348), (326, 2049590), (410, 1629674), (652, 1024795), (815, 819836), (820, 814837), (1630, 409918), (3260, 204959), (4999, 133660), (6683, 99980), (9998, 66830), (13366, 49990), (19996, 33415), (24995, 26732)]