81269840

素因数分解:

$2^4\times 5^1\times {\mathrm{19}}^1\times {\mathrm{127}}^1\times {\mathrm{421}}^1$

素因数の和:580

約数の個数: 80

約数和(自身を含む): 200939520

約数和(自身を除く): 119669680

約数列:

[1, 2, 4, 5, 8, 10, 16, 19, 20, 38, 40, 76, 80, 95, 127, 152, 190, 254, 304, 380, 421, 508, 635, 760, 842, 1016, 1270, 1520, 1684, 2032, 2105, 2413, 2540, 3368, 4210, 4826, 5080, 6736, 7999, 8420, 9652, 10160, 12065, 15998, 16840, 19304, 24130, 31996, 33680, 38608, 39995, 48260, 53467, 63992, 79990, 96520, 106934, 127984, 159980, 193040, 213868, 267335, 319960, 427736, 534670, 639920, 855472, 1015873, 1069340, 2031746, 2138680, 4063492, 4277360, 5079365, 8126984, 10158730, 16253968, 20317460, 40634920, 81269840]

約数ペア:

[(1, 81269840), (2, 40634920), (4, 20317460), (5, 16253968), (8, 10158730), (10, 8126984), (16, 5079365), (19, 4277360), (20, 4063492), (38, 2138680), (40, 2031746), (76, 1069340), (80, 1015873), (95, 855472), (127, 639920), (152, 534670), (190, 427736), (254, 319960), (304, 267335), (380, 213868), (421, 193040), (508, 159980), (635, 127984), (760, 106934), (842, 96520), (1016, 79990), (1270, 63992), (1520, 53467), (1684, 48260), (2032, 39995), (2105, 38608), (2413, 33680), (2540, 31996), (3368, 24130), (4210, 19304), (4826, 16840), (5080, 15998), (6736, 12065), (7999, 10160), (8420, 9652)]