21355440

素因数分解:

$2^4\times 3^1\times 5^1\times {\mathrm{101}}^1\times {\mathrm{881}}^1$

素因数の和:998

約数の個数: 80

約数和(自身を含む): 66933216

約数和(自身を除く): 45577776

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 16, 20, 24, 30, 40, 48, 60, 80, 101, 120, 202, 240, 303, 404, 505, 606, 808, 881, 1010, 1212, 1515, 1616, 1762, 2020, 2424, 2643, 3030, 3524, 4040, 4405, 4848, 5286, 6060, 7048, 8080, 8810, 10572, 12120, 13215, 14096, 17620, 21144, 24240, 26430, 35240, 42288, 52860, 70480, 88981, 105720, 177962, 211440, 266943, 355924, 444905, 533886, 711848, 889810, 1067772, 1334715, 1423696, 1779620, 2135544, 2669430, 3559240, 4271088, 5338860, 7118480, 10677720, 21355440]

約数ペア:

[(1, 21355440), (2, 10677720), (3, 7118480), (4, 5338860), (5, 4271088), (6, 3559240), (8, 2669430), (10, 2135544), (12, 1779620), (15, 1423696), (16, 1334715), (20, 1067772), (24, 889810), (30, 711848), (40, 533886), (48, 444905), (60, 355924), (80, 266943), (101, 211440), (120, 177962), (202, 105720), (240, 88981), (303, 70480), (404, 52860), (505, 42288), (606, 35240), (808, 26430), (881, 24240), (1010, 21144), (1212, 17620), (1515, 14096), (1616, 13215), (1762, 12120), (2020, 10572), (2424, 8810), (2643, 8080), (3030, 7048), (3524, 6060), (4040, 5286), (4405, 4848)]