19901520

素因数分解:

$2^4\times 3^2\times 5^1\times {\mathrm{131}}^1\times {\mathrm{211}}^1$

素因数の和:361

約数の個数: 120

約数和(自身を含む): 67665312

約数和(自身を除く): 47763792

約数列:

[1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, 16, 18, 20, 24, 30, 36, 40, 45, 48, 60, 72, 80, 90, 120, 131, 144, 180, 211, 240, 262, 360, 393, 422, 524, 633, 655, 720, 786, 844, 1048, 1055, 1179, 1266, 1310, 1572, 1688, 1899, 1965, 2096, 2110, 2358, 2532, 2620, 3144, 3165, 3376, 3798, 3930, 4220, 4716, 5064, 5240, 5895, 6288, 6330, 7596, 7860, 8440, 9432, 9495, 10128, 10480, 11790, 12660, 15192, 15720, 16880, 18864, 18990, 23580, 25320, 27641, 30384, 31440, 37980, 47160, 50640, 55282, 75960, 82923, 94320, 110564, 138205, 151920, 165846, 221128, 248769, 276410, 331692, 414615, 442256, 497538, 552820, 663384, 829230, 995076, 1105640, 1243845, 1326768, 1658460, 1990152, 2211280, 2487690, 3316920, 3980304, 4975380, 6633840, 9950760, 19901520]

約数ペア:

[(1, 19901520), (2, 9950760), (3, 6633840), (4, 4975380), (5, 3980304), (6, 3316920), (8, 2487690), (9, 2211280), (10, 1990152), (12, 1658460), (15, 1326768), (16, 1243845), (18, 1105640), (20, 995076), (24, 829230), (30, 663384), (36, 552820), (40, 497538), (45, 442256), (48, 414615), (60, 331692), (72, 276410), (80, 248769), (90, 221128), (120, 165846), (131, 151920), (144, 138205), (180, 110564), (211, 94320), (240, 82923), (262, 75960), (360, 55282), (393, 50640), (422, 47160), (524, 37980), (633, 31440), (655, 30384), (720, 27641), (786, 25320), (844, 23580), (1048, 18990), (1055, 18864), (1179, 16880), (1266, 15720), (1310, 15192), (1572, 12660), (1688, 11790), (1899, 10480), (1965, 10128), (2096, 9495), (2110, 9432), (2358, 8440), (2532, 7860), (2620, 7596), (3144, 6330), (3165, 6288), (3376, 5895), (3798, 5240), (3930, 5064), (4220, 4716)]