20505420

素因数分解:

$2^2\times 3^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{23}}^1\times {\mathrm{127}}^1$

素因数の和:181

約数の個数: 192

約数和(自身を含む): 72253440

約数和(自身を除く): 51748020

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 13, 15, 18, 20, 23, 26, 27, 30, 36, 39, 45, 46, 52, 54, 60, 65, 69, 78, 90, 92, 108, 115, 117, 127, 130, 135, 138, 156, 180, 195, 207, 230, 234, 254, 260, 270, 276, 299, 345, 351, 381, 390, 414, 460, 468, 508, 540, 585, 598, 621, 635, 690, 702, 762, 780, 828, 897, 1035, 1143, 1170, 1196, 1242, 1270, 1380, 1404, 1495, 1524, 1651, 1755, 1794, 1905, 2070, 2286, 2340, 2484, 2540, 2691, 2921, 2990, 3105, 3302, 3429, 3510, 3588, 3810, 4140, 4485, 4572, 4953, 5382, 5715, 5842, 5980, 6210, 6604, 6858, 7020, 7620, 8073, 8255, 8763, 8970, 9906, 10764, 11430, 11684, 12420, 13455, 13716, 14605, 14859, 16146, 16510, 17145, 17526, 17940, 19812, 22860, 24765, 26289, 26910, 29210, 29718, 32292, 33020, 34290, 35052, 37973, 40365, 43815, 44577, 49530, 52578, 53820, 58420, 59436, 68580, 74295, 75946, 78867, 80730, 87630, 89154, 99060, 105156, 113919, 131445, 148590, 151892, 157734, 161460, 175260, 178308, 189865, 222885, 227838, 262890, 297180, 315468, 341757, 379730, 394335, 445770, 455676, 525780, 569595, 683514, 759460, 788670, 891540, 1025271, 1139190, 1367028, 1577340, 1708785, 2050542, 2278380, 3417570, 4101084, 5126355, 6835140, 10252710, 20505420]

約数ペア:

[(1, 20505420), (2, 10252710), (3, 6835140), (4, 5126355), (5, 4101084), (6, 3417570), (9, 2278380), (10, 2050542), (12, 1708785), (13, 1577340), (15, 1367028), (18, 1139190), (20, 1025271), (23, 891540), (26, 788670), (27, 759460), (30, 683514), (36, 569595), (39, 525780), (45, 455676), (46, 445770), (52, 394335), (54, 379730), (60, 341757), (65, 315468), (69, 297180), (78, 262890), (90, 227838), (92, 222885), (108, 189865), (115, 178308), (117, 175260), (127, 161460), (130, 157734), (135, 151892), (138, 148590), (156, 131445), (180, 113919), (195, 105156), (207, 99060), (230, 89154), (234, 87630), (254, 80730), (260, 78867), (270, 75946), (276, 74295), (299, 68580), (345, 59436), (351, 58420), (381, 53820), (390, 52578), (414, 49530), (460, 44577), (468, 43815), (508, 40365), (540, 37973), (585, 35052), (598, 34290), (621, 33020), (635, 32292), (690, 29718), (702, 29210), (762, 26910), (780, 26289), (828, 24765), (897, 22860), (1035, 19812), (1143, 17940), (1170, 17526), (1196, 17145), (1242, 16510), (1270, 16146), (1380, 14859), (1404, 14605), (1495, 13716), (1524, 13455), (1651, 12420), (1755, 11684), (1794, 11430), (1905, 10764), (2070, 9906), (2286, 8970), (2340, 8763), (2484, 8255), (2540, 8073), (2691, 7620), (2921, 7020), (2990, 6858), (3105, 6604), (3302, 6210), (3429, 5980), (3510, 5842), (3588, 5715), (3810, 5382), (4140, 4953), (4485, 4572)]