81493480

素因数分解:

$2^3\times 5^1\times {\mathrm{29}}^1\times {\mathrm{163}}^1\times {\mathrm{431}}^1$

素因数の和:634

約数の個数: 64

約数和(自身を含む): 191289600

約数和(自身を除く): 109796120

約数列:

[1, 2, 4, 5, 8, 10, 20, 29, 40, 58, 116, 145, 163, 232, 290, 326, 431, 580, 652, 815, 862, 1160, 1304, 1630, 1724, 2155, 3260, 3448, 4310, 4727, 6520, 8620, 9454, 12499, 17240, 18908, 23635, 24998, 37816, 47270, 49996, 62495, 70253, 94540, 99992, 124990, 140506, 189080, 249980, 281012, 351265, 499960, 562024, 702530, 1405060, 2037337, 2810120, 4074674, 8149348, 10186685, 16298696, 20373370, 40746740, 81493480]

約数ペア:

[(1, 81493480), (2, 40746740), (4, 20373370), (5, 16298696), (8, 10186685), (10, 8149348), (20, 4074674), (29, 2810120), (40, 2037337), (58, 1405060), (116, 702530), (145, 562024), (163, 499960), (232, 351265), (290, 281012), (326, 249980), (431, 189080), (580, 140506), (652, 124990), (815, 99992), (862, 94540), (1160, 70253), (1304, 62495), (1630, 49996), (1724, 47270), (2155, 37816), (3260, 24998), (3448, 23635), (4310, 18908), (4727, 17240), (6520, 12499), (8620, 9454)]