80609920

素因数分解:

$2^7\times 5^1\times {\mathrm{17}}^1\times {\mathrm{31}}^1\times {\mathrm{239}}^1$

素因数の和:306

約数の個数: 128

約数和(自身を含む): 211507200

約数和(自身を除く): 130897280

約数列:

[1, 2, 4, 5, 8, 10, 16, 17, 20, 31, 32, 34, 40, 62, 64, 68, 80, 85, 124, 128, 136, 155, 160, 170, 239, 248, 272, 310, 320, 340, 478, 496, 527, 544, 620, 640, 680, 956, 992, 1054, 1088, 1195, 1240, 1360, 1912, 1984, 2108, 2176, 2390, 2480, 2635, 2720, 3824, 3968, 4063, 4216, 4780, 4960, 5270, 5440, 7409, 7648, 8126, 8432, 9560, 9920, 10540, 10880, 14818, 15296, 16252, 16864, 19120, 19840, 20315, 21080, 29636, 30592, 32504, 33728, 37045, 38240, 40630, 42160, 59272, 65008, 67456, 74090, 76480, 81260, 84320, 118544, 125953, 130016, 148180, 152960, 162520, 168640, 237088, 251906, 260032, 296360, 325040, 337280, 474176, 503812, 520064, 592720, 629765, 650080, 948352, 1007624, 1185440, 1259530, 1300160, 2015248, 2370880, 2519060, 2600320, 4030496, 4741760, 5038120, 8060992, 10076240, 16121984, 20152480, 40304960, 80609920]

約数ペア:

[(1, 80609920), (2, 40304960), (4, 20152480), (5, 16121984), (8, 10076240), (10, 8060992), (16, 5038120), (17, 4741760), (20, 4030496), (31, 2600320), (32, 2519060), (34, 2370880), (40, 2015248), (62, 1300160), (64, 1259530), (68, 1185440), (80, 1007624), (85, 948352), (124, 650080), (128, 629765), (136, 592720), (155, 520064), (160, 503812), (170, 474176), (239, 337280), (248, 325040), (272, 296360), (310, 260032), (320, 251906), (340, 237088), (478, 168640), (496, 162520), (527, 152960), (544, 148180), (620, 130016), (640, 125953), (680, 118544), (956, 84320), (992, 81260), (1054, 76480), (1088, 74090), (1195, 67456), (1240, 65008), (1360, 59272), (1912, 42160), (1984, 40630), (2108, 38240), (2176, 37045), (2390, 33728), (2480, 32504), (2635, 30592), (2720, 29636), (3824, 21080), (3968, 20315), (4063, 19840), (4216, 19120), (4780, 16864), (4960, 16252), (5270, 15296), (5440, 14818), (7409, 10880), (7648, 10540), (8126, 9920), (8432, 9560)]