21079359

素因数分解:

$3^4\times 7^2\times {\mathrm{47}}^1\times {\mathrm{113}}^1$

素因数の和:186

約数の個数: 60

約数和(自身を含む): 37740384

約数和(自身を除く): 16661025

約数列:

[1, 3, 7, 9, 21, 27, 47, 49, 63, 81, 113, 141, 147, 189, 329, 339, 423, 441, 567, 791, 987, 1017, 1269, 1323, 2303, 2373, 2961, 3051, 3807, 3969, 5311, 5537, 6909, 7119, 8883, 9153, 15933, 16611, 20727, 21357, 26649, 37177, 47799, 49833, 62181, 64071, 111531, 143397, 149499, 186543, 260239, 334593, 430191, 448497, 780717, 1003779, 2342151, 3011337, 7026453, 21079359]

約数ペア:

[(1, 21079359), (3, 7026453), (7, 3011337), (9, 2342151), (21, 1003779), (27, 780717), (47, 448497), (49, 430191), (63, 334593), (81, 260239), (113, 186543), (141, 149499), (147, 143397), (189, 111531), (329, 64071), (339, 62181), (423, 49833), (441, 47799), (567, 37177), (791, 26649), (987, 21357), (1017, 20727), (1269, 16611), (1323, 15933), (2303, 9153), (2373, 8883), (2961, 7119), (3051, 6909), (3807, 5537), (3969, 5311)]