18884271

素因数分解:

$3^1\times 7^1\times {\mathrm{19}}^2\times {\mathrm{47}}^1\times {\mathrm{53}}^1$

素因数の和:148

約数の個数: 48

約数和(自身を含む): 31601664

約数和(自身を除く): 12717393

約数列:

[1, 3, 7, 19, 21, 47, 53, 57, 133, 141, 159, 329, 361, 371, 399, 893, 987, 1007, 1083, 1113, 2491, 2527, 2679, 3021, 6251, 7049, 7473, 7581, 16967, 17437, 18753, 19133, 21147, 47329, 50901, 52311, 57399, 118769, 133931, 141987, 331303, 356307, 401793, 899251, 993909, 2697753, 6294757, 18884271]

約数ペア:

[(1, 18884271), (3, 6294757), (7, 2697753), (19, 993909), (21, 899251), (47, 401793), (53, 356307), (57, 331303), (133, 141987), (141, 133931), (159, 118769), (329, 57399), (361, 52311), (371, 50901), (399, 47329), (893, 21147), (987, 19133), (1007, 18753), (1083, 17437), (1113, 16967), (2491, 7581), (2527, 7473), (2679, 7049), (3021, 6251)]