81510520

素因数分解:

$2^3\times 5^1\times 7^3\times {\mathrm{13}}^1\times {\mathrm{457}}^1$

素因数の和:502

約数の個数: 128

約数和(自身を含む): 230832000

約数和(自身を除く): 149321480

約数列:

[1, 2, 4, 5, 7, 8, 10, 13, 14, 20, 26, 28, 35, 40, 49, 52, 56, 65, 70, 91, 98, 104, 130, 140, 182, 196, 245, 260, 280, 343, 364, 392, 455, 457, 490, 520, 637, 686, 728, 910, 914, 980, 1274, 1372, 1715, 1820, 1828, 1960, 2285, 2548, 2744, 3185, 3199, 3430, 3640, 3656, 4459, 4570, 5096, 5941, 6370, 6398, 6860, 8918, 9140, 11882, 12740, 12796, 13720, 15995, 17836, 18280, 22295, 22393, 23764, 25480, 25592, 29705, 31990, 35672, 41587, 44590, 44786, 47528, 59410, 63980, 83174, 89180, 89572, 111965, 118820, 127960, 156751, 166348, 178360, 179144, 207935, 223930, 237640, 291109, 313502, 332696, 415870, 447860, 582218, 627004, 783755, 831740, 895720, 1164436, 1254008, 1455545, 1567510, 1663480, 2037763, 2328872, 2911090, 3135020, 4075526, 5822180, 6270040, 8151052, 10188815, 11644360, 16302104, 20377630, 40755260, 81510520]

約数ペア:

[(1, 81510520), (2, 40755260), (4, 20377630), (5, 16302104), (7, 11644360), (8, 10188815), (10, 8151052), (13, 6270040), (14, 5822180), (20, 4075526), (26, 3135020), (28, 2911090), (35, 2328872), (40, 2037763), (49, 1663480), (52, 1567510), (56, 1455545), (65, 1254008), (70, 1164436), (91, 895720), (98, 831740), (104, 783755), (130, 627004), (140, 582218), (182, 447860), (196, 415870), (245, 332696), (260, 313502), (280, 291109), (343, 237640), (364, 223930), (392, 207935), (455, 179144), (457, 178360), (490, 166348), (520, 156751), (637, 127960), (686, 118820), (728, 111965), (910, 89572), (914, 89180), (980, 83174), (1274, 63980), (1372, 59410), (1715, 47528), (1820, 44786), (1828, 44590), (1960, 41587), (2285, 35672), (2548, 31990), (2744, 29705), (3185, 25592), (3199, 25480), (3430, 23764), (3640, 22393), (3656, 22295), (4459, 18280), (4570, 17836), (5096, 15995), (5941, 13720), (6370, 12796), (6398, 12740), (6860, 11882), (8918, 9140)]