78538640

素因数分解:

$2^4\times 5^1\times {\mathrm{17}}^2\times {\mathrm{43}}^1\times {\mathrm{79}}^1$

素因数の和:169

約数の個数: 120

約数和(自身を含む): 200999040

約数和(自身を除く): 122460400

約数列:

[1, 2, 4, 5, 8, 10, 16, 17, 20, 34, 40, 43, 68, 79, 80, 85, 86, 136, 158, 170, 172, 215, 272, 289, 316, 340, 344, 395, 430, 578, 632, 680, 688, 731, 790, 860, 1156, 1264, 1343, 1360, 1445, 1462, 1580, 1720, 2312, 2686, 2890, 2924, 3160, 3397, 3440, 3655, 4624, 5372, 5780, 5848, 6320, 6715, 6794, 7310, 10744, 11560, 11696, 12427, 13430, 13588, 14620, 16985, 21488, 22831, 23120, 24854, 26860, 27176, 29240, 33970, 45662, 49708, 53720, 54352, 57749, 58480, 62135, 67940, 91324, 99416, 107440, 114155, 115498, 124270, 135880, 182648, 198832, 228310, 230996, 248540, 271760, 288745, 365296, 456620, 461992, 497080, 577490, 913240, 923984, 981733, 994160, 1154980, 1826480, 1963466, 2309960, 3926932, 4619920, 4908665, 7853864, 9817330, 15707728, 19634660, 39269320, 78538640]

約数ペア:

[(1, 78538640), (2, 39269320), (4, 19634660), (5, 15707728), (8, 9817330), (10, 7853864), (16, 4908665), (17, 4619920), (20, 3926932), (34, 2309960), (40, 1963466), (43, 1826480), (68, 1154980), (79, 994160), (80, 981733), (85, 923984), (86, 913240), (136, 577490), (158, 497080), (170, 461992), (172, 456620), (215, 365296), (272, 288745), (289, 271760), (316, 248540), (340, 230996), (344, 228310), (395, 198832), (430, 182648), (578, 135880), (632, 124270), (680, 115498), (688, 114155), (731, 107440), (790, 99416), (860, 91324), (1156, 67940), (1264, 62135), (1343, 58480), (1360, 57749), (1445, 54352), (1462, 53720), (1580, 49708), (1720, 45662), (2312, 33970), (2686, 29240), (2890, 27176), (2924, 26860), (3160, 24854), (3397, 23120), (3440, 22831), (3655, 21488), (4624, 16985), (5372, 14620), (5780, 13588), (5848, 13430), (6320, 12427), (6715, 11696), (6794, 11560), (7310, 10744)]