21747220

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{41}}^1\times {\mathrm{2411}}^1$

素因数の和:2472

約数の個数: 48

約数和(自身を含む): 51057216

約数和(自身を除く): 29309996

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 41, 44, 55, 82, 110, 164, 205, 220, 410, 451, 820, 902, 1804, 2255, 2411, 4510, 4822, 9020, 9644, 12055, 24110, 26521, 48220, 53042, 98851, 106084, 132605, 197702, 265210, 395404, 494255, 530420, 988510, 1087361, 1977020, 2174722, 4349444, 5436805, 10873610, 21747220]

約数ペア:

[(1, 21747220), (2, 10873610), (4, 5436805), (5, 4349444), (10, 2174722), (11, 1977020), (20, 1087361), (22, 988510), (41, 530420), (44, 494255), (55, 395404), (82, 265210), (110, 197702), (164, 132605), (205, 106084), (220, 98851), (410, 53042), (451, 48220), (820, 26521), (902, 24110), (1804, 12055), (2255, 9644), (2411, 9020), (4510, 4822)]