19419920

素因数分解:

$2^4\times 5^1\times {\mathrm{13}}^1\times {\mathrm{71}}^1\times {\mathrm{263}}^1$

素因数の和:360

約数の個数: 80

約数和(自身を含む): 49496832

約数和(自身を除く): 30076912

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 40, 52, 65, 71, 80, 104, 130, 142, 208, 260, 263, 284, 355, 520, 526, 568, 710, 923, 1040, 1052, 1136, 1315, 1420, 1846, 2104, 2630, 2840, 3419, 3692, 4208, 4615, 5260, 5680, 6838, 7384, 9230, 10520, 13676, 14768, 17095, 18460, 18673, 21040, 27352, 34190, 36920, 37346, 54704, 68380, 73840, 74692, 93365, 136760, 149384, 186730, 242749, 273520, 298768, 373460, 485498, 746920, 970996, 1213745, 1493840, 1941992, 2427490, 3883984, 4854980, 9709960, 19419920]

約数ペア:

[(1, 19419920), (2, 9709960), (4, 4854980), (5, 3883984), (8, 2427490), (10, 1941992), (13, 1493840), (16, 1213745), (20, 970996), (26, 746920), (40, 485498), (52, 373460), (65, 298768), (71, 273520), (80, 242749), (104, 186730), (130, 149384), (142, 136760), (208, 93365), (260, 74692), (263, 73840), (284, 68380), (355, 54704), (520, 37346), (526, 36920), (568, 34190), (710, 27352), (923, 21040), (1040, 18673), (1052, 18460), (1136, 17095), (1315, 14768), (1420, 13676), (1846, 10520), (2104, 9230), (2630, 7384), (2840, 6838), (3419, 5680), (3692, 5260), (4208, 4615)]