21331000

素因数分解:

$2^3\times 5^3\times {\mathrm{83}}^1\times {\mathrm{257}}^1$

素因数の和:361

約数の個数: 64

約数和(自身を含む): 50712480

約数和(自身を除く): 29381480

約数列:

[1, 2, 4, 5, 8, 10, 20, 25, 40, 50, 83, 100, 125, 166, 200, 250, 257, 332, 415, 500, 514, 664, 830, 1000, 1028, 1285, 1660, 2056, 2075, 2570, 3320, 4150, 5140, 6425, 8300, 10280, 10375, 12850, 16600, 20750, 21331, 25700, 32125, 41500, 42662, 51400, 64250, 83000, 85324, 106655, 128500, 170648, 213310, 257000, 426620, 533275, 853240, 1066550, 2133100, 2666375, 4266200, 5332750, 10665500, 21331000]

約数ペア:

[(1, 21331000), (2, 10665500), (4, 5332750), (5, 4266200), (8, 2666375), (10, 2133100), (20, 1066550), (25, 853240), (40, 533275), (50, 426620), (83, 257000), (100, 213310), (125, 170648), (166, 128500), (200, 106655), (250, 85324), (257, 83000), (332, 64250), (415, 51400), (500, 42662), (514, 41500), (664, 32125), (830, 25700), (1000, 21331), (1028, 20750), (1285, 16600), (1660, 12850), (2056, 10375), (2075, 10280), (2570, 8300), (3320, 6425), (4150, 5140)]