21131493500

素因数分解:

$2^2\times 5^3\times {\mathrm{13}}^1\times {\mathrm{157}}^1\times {\mathrm{20707}}^1$

素因数の和:20896

約数の個数: 96

約数和(自身を含む): 50020256832

約数和(自身を除く): 28888763332

約数列:

[1, 2, 4, 5, 10, 13, 20, 25, 26, 50, 52, 65, 100, 125, 130, 157, 250, 260, 314, 325, 500, 628, 650, 785, 1300, 1570, 1625, 2041, 3140, 3250, 3925, 4082, 6500, 7850, 8164, 10205, 15700, 19625, 20410, 20707, 39250, 40820, 41414, 51025, 78500, 82828, 102050, 103535, 204100, 207070, 255125, 269191, 414140, 510250, 517675, 538382, 1020500, 1035350, 1076764, 1345955, 2070700, 2588375, 2691910, 3250999, 5176750, 5383820, 6501998, 6729775, 10353500, 13003996, 13459550, 16254995, 26919100, 32509990, 33648875, 42262987, 65019980, 67297750, 81274975, 84525974, 134595500, 162549950, 169051948, 211314935, 325099900, 406374875, 422629870, 812749750, 845259740, 1056574675, 1625499500, 2113149350, 4226298700, 5282873375, 10565746750, 21131493500]

約数ペア:

[(1, 21131493500), (2, 10565746750), (4, 5282873375), (5, 4226298700), (10, 2113149350), (13, 1625499500), (20, 1056574675), (25, 845259740), (26, 812749750), (50, 422629870), (52, 406374875), (65, 325099900), (100, 211314935), (125, 169051948), (130, 162549950), (157, 134595500), (250, 84525974), (260, 81274975), (314, 67297750), (325, 65019980), (500, 42262987), (628, 33648875), (650, 32509990), (785, 26919100), (1300, 16254995), (1570, 13459550), (1625, 13003996), (2041, 10353500), (3140, 6729775), (3250, 6501998), (3925, 5383820), (4082, 5176750), (6500, 3250999), (7850, 2691910), (8164, 2588375), (10205, 2070700), (15700, 1345955), (19625, 1076764), (20410, 1035350), (20707, 1020500), (39250, 538382), (40820, 517675), (41414, 510250), (51025, 414140), (78500, 269191), (82828, 255125), (102050, 207070), (103535, 204100)]