21884751

素因数分解:

$3^2\times 7^1\times {\mathrm{19}}^1\times {\mathrm{47}}^1\times {\mathrm{389}}^1$

素因数の和:468

約数の個数: 48

約数和(自身を含む): 38937600

約数和(自身を除く): 17052849

約数列:

[1, 3, 7, 9, 19, 21, 47, 57, 63, 133, 141, 171, 329, 389, 399, 423, 893, 987, 1167, 1197, 2679, 2723, 2961, 3501, 6251, 7391, 8037, 8169, 18283, 18753, 22173, 24507, 51737, 54849, 56259, 66519, 127981, 155211, 164547, 347377, 383943, 465633, 1042131, 1151829, 2431639, 3126393, 7294917, 21884751]

約数ペア:

[(1, 21884751), (3, 7294917), (7, 3126393), (9, 2431639), (19, 1151829), (21, 1042131), (47, 465633), (57, 383943), (63, 347377), (133, 164547), (141, 155211), (171, 127981), (329, 66519), (389, 56259), (399, 54849), (423, 51737), (893, 24507), (987, 22173), (1167, 18753), (1197, 18283), (2679, 8169), (2723, 8037), (2961, 7391), (3501, 6251)]