20881266

素因数分解:

$2^1\times 3^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{137}}^1\times {\mathrm{191}}^1$

素因数の和:359

約数の個数: 64

約数和(自身を含む): 50872320

約数和(自身を除く): 29991054

約数列:

[1, 2, 3, 6, 7, 14, 19, 21, 38, 42, 57, 114, 133, 137, 191, 266, 274, 382, 399, 411, 573, 798, 822, 959, 1146, 1337, 1918, 2603, 2674, 2877, 3629, 4011, 5206, 5754, 7258, 7809, 8022, 10887, 15618, 18221, 21774, 25403, 26167, 36442, 50806, 52334, 54663, 76209, 78501, 109326, 152418, 157002, 183169, 366338, 497173, 549507, 994346, 1099014, 1491519, 2983038, 3480211, 6960422, 10440633, 20881266]

約数ペア:

[(1, 20881266), (2, 10440633), (3, 6960422), (6, 3480211), (7, 2983038), (14, 1491519), (19, 1099014), (21, 994346), (38, 549507), (42, 497173), (57, 366338), (114, 183169), (133, 157002), (137, 152418), (191, 109326), (266, 78501), (274, 76209), (382, 54663), (399, 52334), (411, 50806), (573, 36442), (798, 26167), (822, 25403), (959, 21774), (1146, 18221), (1337, 15618), (1918, 10887), (2603, 8022), (2674, 7809), (2877, 7258), (3629, 5754), (4011, 5206)]