21708280

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{103}}^1\times {\mathrm{479}}^1$

素因数の和:604

約数の個数: 64

約数和(自身を含む): 53913600

約数和(自身を除く): 32205320

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 40, 44, 55, 88, 103, 110, 206, 220, 412, 440, 479, 515, 824, 958, 1030, 1133, 1916, 2060, 2266, 2395, 3832, 4120, 4532, 4790, 5269, 5665, 9064, 9580, 10538, 11330, 19160, 21076, 22660, 26345, 42152, 45320, 49337, 52690, 98674, 105380, 197348, 210760, 246685, 394696, 493370, 542707, 986740, 1085414, 1973480, 2170828, 2713535, 4341656, 5427070, 10854140, 21708280]

約数ペア:

[(1, 21708280), (2, 10854140), (4, 5427070), (5, 4341656), (8, 2713535), (10, 2170828), (11, 1973480), (20, 1085414), (22, 986740), (40, 542707), (44, 493370), (55, 394696), (88, 246685), (103, 210760), (110, 197348), (206, 105380), (220, 98674), (412, 52690), (440, 49337), (479, 45320), (515, 42152), (824, 26345), (958, 22660), (1030, 21076), (1133, 19160), (1916, 11330), (2060, 10538), (2266, 9580), (2395, 9064), (3832, 5665), (4120, 5269), (4532, 4790)]