31278820

素因数分解:

$2^2\times 5^1\times {\mathrm{29}}^1\times {\mathrm{199}}^1\times {\mathrm{271}}^1$

素因数の和:508

約数の個数: 48

約数和(自身を含む): 68544000

約数和(自身を除く): 37265180

約数列:

[1, 2, 4, 5, 10, 20, 29, 58, 116, 145, 199, 271, 290, 398, 542, 580, 796, 995, 1084, 1355, 1990, 2710, 3980, 5420, 5771, 7859, 11542, 15718, 23084, 28855, 31436, 39295, 53929, 57710, 78590, 107858, 115420, 157180, 215716, 269645, 539290, 1078580, 1563941, 3127882, 6255764, 7819705, 15639410, 31278820]

約数ペア:

[(1, 31278820), (2, 15639410), (4, 7819705), (5, 6255764), (10, 3127882), (20, 1563941), (29, 1078580), (58, 539290), (116, 269645), (145, 215716), (199, 157180), (271, 115420), (290, 107858), (398, 78590), (542, 57710), (580, 53929), (796, 39295), (995, 31436), (1084, 28855), (1355, 23084), (1990, 15718), (2710, 11542), (3980, 7859), (5420, 5771)]