20681320

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^2\times {\mathrm{4273}}^1$

素因数の和:4306

約数の個数: 48

約数和(自身を含む): 51159780

約数和(自身を除く): 30478460

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 40, 44, 55, 88, 110, 121, 220, 242, 440, 484, 605, 968, 1210, 2420, 4273, 4840, 8546, 17092, 21365, 34184, 42730, 47003, 85460, 94006, 170920, 188012, 235015, 376024, 470030, 517033, 940060, 1034066, 1880120, 2068132, 2585165, 4136264, 5170330, 10340660, 20681320]

約数ペア:

[(1, 20681320), (2, 10340660), (4, 5170330), (5, 4136264), (8, 2585165), (10, 2068132), (11, 1880120), (20, 1034066), (22, 940060), (40, 517033), (44, 470030), (55, 376024), (88, 235015), (110, 188012), (121, 170920), (220, 94006), (242, 85460), (440, 47003), (484, 42730), (605, 34184), (968, 21365), (1210, 17092), (2420, 8546), (4273, 4840)]