81211520

素因数分解:

$2^7\times 5^1\times {\mathrm{13}}^1\times {\mathrm{43}}^1\times {\mathrm{227}}^1$

素因数の和:302

約数の個数: 128

約数和(自身を含む): 214885440

約数和(自身を除く): 133673920

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 32, 40, 43, 52, 64, 65, 80, 86, 104, 128, 130, 160, 172, 208, 215, 227, 260, 320, 344, 416, 430, 454, 520, 559, 640, 688, 832, 860, 908, 1040, 1118, 1135, 1376, 1664, 1720, 1816, 2080, 2236, 2270, 2752, 2795, 2951, 3440, 3632, 4160, 4472, 4540, 5504, 5590, 5902, 6880, 7264, 8320, 8944, 9080, 9761, 11180, 11804, 13760, 14528, 14755, 17888, 18160, 19522, 22360, 23608, 27520, 29056, 29510, 35776, 36320, 39044, 44720, 47216, 48805, 59020, 71552, 72640, 78088, 89440, 94432, 97610, 118040, 126893, 145280, 156176, 178880, 188864, 195220, 236080, 253786, 312352, 357760, 377728, 390440, 472160, 507572, 624704, 634465, 780880, 944320, 1015144, 1249408, 1268930, 1561760, 1888640, 2030288, 2537860, 3123520, 4060576, 5075720, 6247040, 8121152, 10151440, 16242304, 20302880, 40605760, 81211520]

約数ペア:

[(1, 81211520), (2, 40605760), (4, 20302880), (5, 16242304), (8, 10151440), (10, 8121152), (13, 6247040), (16, 5075720), (20, 4060576), (26, 3123520), (32, 2537860), (40, 2030288), (43, 1888640), (52, 1561760), (64, 1268930), (65, 1249408), (80, 1015144), (86, 944320), (104, 780880), (128, 634465), (130, 624704), (160, 507572), (172, 472160), (208, 390440), (215, 377728), (227, 357760), (260, 312352), (320, 253786), (344, 236080), (416, 195220), (430, 188864), (454, 178880), (520, 156176), (559, 145280), (640, 126893), (688, 118040), (832, 97610), (860, 94432), (908, 89440), (1040, 78088), (1118, 72640), (1135, 71552), (1376, 59020), (1664, 48805), (1720, 47216), (1816, 44720), (2080, 39044), (2236, 36320), (2270, 35776), (2752, 29510), (2795, 29056), (2951, 27520), (3440, 23608), (3632, 22360), (4160, 19522), (4472, 18160), (4540, 17888), (5504, 14755), (5590, 14528), (5902, 13760), (6880, 11804), (7264, 11180), (8320, 9761), (8944, 9080)]