28540071

素因数分解:

$3^2\times 7^1\times {\mathrm{19}}^1\times {\mathrm{113}}^1\times {\mathrm{211}}^1$

素因数の和:356

約数の個数: 48

約数和(自身を含む): 50269440

約数和(自身を除く): 21729369

約数列:

[1, 3, 7, 9, 19, 21, 57, 63, 113, 133, 171, 211, 339, 399, 633, 791, 1017, 1197, 1477, 1899, 2147, 2373, 4009, 4431, 6441, 7119, 12027, 13293, 15029, 19323, 23843, 28063, 36081, 45087, 71529, 84189, 135261, 166901, 214587, 252567, 453017, 500703, 1359051, 1502109, 3171119, 4077153, 9513357, 28540071]

約数ペア:

[(1, 28540071), (3, 9513357), (7, 4077153), (9, 3171119), (19, 1502109), (21, 1359051), (57, 500703), (63, 453017), (113, 252567), (133, 214587), (171, 166901), (211, 135261), (339, 84189), (399, 71529), (633, 45087), (791, 36081), (1017, 28063), (1197, 23843), (1477, 19323), (1899, 15029), (2147, 13293), (2373, 12027), (4009, 7119), (4431, 6441)]