18804520

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{239}}^1\times {\mathrm{281}}^1$

素因数の和:538

約数の個数: 64

約数和(自身を含む): 48729600

約数和(自身を除く): 29925080

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 140, 239, 280, 281, 478, 562, 956, 1124, 1195, 1405, 1673, 1912, 1967, 2248, 2390, 2810, 3346, 3934, 4780, 5620, 6692, 7868, 8365, 9560, 9835, 11240, 13384, 15736, 16730, 19670, 33460, 39340, 66920, 67159, 78680, 134318, 268636, 335795, 470113, 537272, 671590, 940226, 1343180, 1880452, 2350565, 2686360, 3760904, 4701130, 9402260, 18804520]

約数ペア:

[(1, 18804520), (2, 9402260), (4, 4701130), (5, 3760904), (7, 2686360), (8, 2350565), (10, 1880452), (14, 1343180), (20, 940226), (28, 671590), (35, 537272), (40, 470113), (56, 335795), (70, 268636), (140, 134318), (239, 78680), (280, 67159), (281, 66920), (478, 39340), (562, 33460), (956, 19670), (1124, 16730), (1195, 15736), (1405, 13384), (1673, 11240), (1912, 9835), (1967, 9560), (2248, 8365), (2390, 7868), (2810, 6692), (3346, 5620), (3934, 4780)]