21860828

素因数分解:

$2^2\times {\mathrm{11}}^2\times {\mathrm{31}}^2\times {\mathrm{47}}^1$

素因数の和:135

約数の個数: 54

約数和(自身を含む): 44375184

約数和(自身を除く): 22514356

約数列:

[1, 2, 4, 11, 22, 31, 44, 47, 62, 94, 121, 124, 188, 242, 341, 484, 517, 682, 961, 1034, 1364, 1457, 1922, 2068, 2914, 3751, 3844, 5687, 5828, 7502, 10571, 11374, 15004, 16027, 21142, 22748, 32054, 42284, 45167, 64108, 90334, 116281, 176297, 180668, 232562, 352594, 465124, 496837, 705188, 993674, 1987348, 5465207, 10930414, 21860828]

約数ペア:

[(1, 21860828), (2, 10930414), (4, 5465207), (11, 1987348), (22, 993674), (31, 705188), (44, 496837), (47, 465124), (62, 352594), (94, 232562), (121, 180668), (124, 176297), (188, 116281), (242, 90334), (341, 64108), (484, 45167), (517, 42284), (682, 32054), (961, 22748), (1034, 21142), (1364, 16027), (1457, 15004), (1922, 11374), (2068, 10571), (2914, 7502), (3751, 5828), (3844, 5687)]