1388892220

素因数分解:

$2^2\times 5^1\times {\mathrm{41}}^1\times {\mathrm{521}}^1\times {\mathrm{3251}}^1$

素因数の和:3822

約数の個数: 48

約数和(自身を含む): 2994467616

約数和(自身を除く): 1605575396

約数列:

[1, 2, 4, 5, 10, 20, 41, 82, 164, 205, 410, 521, 820, 1042, 2084, 2605, 3251, 5210, 6502, 10420, 13004, 16255, 21361, 32510, 42722, 65020, 85444, 106805, 133291, 213610, 266582, 427220, 533164, 666455, 1332910, 1693771, 2665820, 3387542, 6775084, 8468855, 16937710, 33875420, 69444611, 138889222, 277778444, 347223055, 694446110, 1388892220]

約数ペア:

[(1, 1388892220), (2, 694446110), (4, 347223055), (5, 277778444), (10, 138889222), (20, 69444611), (41, 33875420), (82, 16937710), (164, 8468855), (205, 6775084), (410, 3387542), (521, 2665820), (820, 1693771), (1042, 1332910), (2084, 666455), (2605, 533164), (3251, 427220), (5210, 266582), (6502, 213610), (10420, 133291), (13004, 106805), (16255, 85444), (21361, 65020), (32510, 42722)]