21439920

素因数分解:

$2^4\times 3^1\times 5^1\times {\mathrm{157}}^1\times {\mathrm{569}}^1$

素因数の和:742

約数の個数: 80

約数和(自身を含む): 67004640

約数和(自身を除く): 45564720

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 16, 20, 24, 30, 40, 48, 60, 80, 120, 157, 240, 314, 471, 569, 628, 785, 942, 1138, 1256, 1570, 1707, 1884, 2276, 2355, 2512, 2845, 3140, 3414, 3768, 4552, 4710, 5690, 6280, 6828, 7536, 8535, 9104, 9420, 11380, 12560, 13656, 17070, 18840, 22760, 27312, 34140, 37680, 45520, 68280, 89333, 136560, 178666, 267999, 357332, 446665, 535998, 714664, 893330, 1071996, 1339995, 1429328, 1786660, 2143992, 2679990, 3573320, 4287984, 5359980, 7146640, 10719960, 21439920]

約数ペア:

[(1, 21439920), (2, 10719960), (3, 7146640), (4, 5359980), (5, 4287984), (6, 3573320), (8, 2679990), (10, 2143992), (12, 1786660), (15, 1429328), (16, 1339995), (20, 1071996), (24, 893330), (30, 714664), (40, 535998), (48, 446665), (60, 357332), (80, 267999), (120, 178666), (157, 136560), (240, 89333), (314, 68280), (471, 45520), (569, 37680), (628, 34140), (785, 27312), (942, 22760), (1138, 18840), (1256, 17070), (1570, 13656), (1707, 12560), (1884, 11380), (2276, 9420), (2355, 9104), (2512, 8535), (2845, 7536), (3140, 6828), (3414, 6280), (3768, 5690), (4552, 4710)]