18988684

素因数分解:

$2^2\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{89}}^1\times {\mathrm{373}}^1$

素因数の和:490

約数の個数: 48

約数和(自身を含む): 39584160

約数和(自身を除く): 20595476

約数列:

[1, 2, 4, 11, 13, 22, 26, 44, 52, 89, 143, 178, 286, 356, 373, 572, 746, 979, 1157, 1492, 1958, 2314, 3916, 4103, 4628, 4849, 8206, 9698, 12727, 16412, 19396, 25454, 33197, 50908, 53339, 66394, 106678, 132788, 213356, 365167, 431561, 730334, 863122, 1460668, 1726244, 4747171, 9494342, 18988684]

約数ペア:

[(1, 18988684), (2, 9494342), (4, 4747171), (11, 1726244), (13, 1460668), (22, 863122), (26, 730334), (44, 431561), (52, 365167), (89, 213356), (143, 132788), (178, 106678), (286, 66394), (356, 53339), (373, 50908), (572, 33197), (746, 25454), (979, 19396), (1157, 16412), (1492, 12727), (1958, 9698), (2314, 8206), (3916, 4849), (4103, 4628)]