21295953

素因数分解:

$3^4\times 7^1\times {\mathrm{23}}^2\times {\mathrm{71}}^1$

素因数の和:136

約数の個数: 60

約数和(自身を含む): 38541888

約数和(自身を除く): 17245935

約数列:

[1, 3, 7, 9, 21, 23, 27, 63, 69, 71, 81, 161, 189, 207, 213, 483, 497, 529, 567, 621, 639, 1449, 1491, 1587, 1633, 1863, 1917, 3703, 4347, 4473, 4761, 4899, 5751, 11109, 11431, 13041, 13419, 14283, 14697, 33327, 34293, 37559, 40257, 42849, 44091, 99981, 102879, 112677, 132273, 262913, 299943, 308637, 338031, 788739, 925911, 1014093, 2366217, 3042279, 7098651, 21295953]

約数ペア:

[(1, 21295953), (3, 7098651), (7, 3042279), (9, 2366217), (21, 1014093), (23, 925911), (27, 788739), (63, 338031), (69, 308637), (71, 299943), (81, 262913), (161, 132273), (189, 112677), (207, 102879), (213, 99981), (483, 44091), (497, 42849), (529, 40257), (567, 37559), (621, 34293), (639, 33327), (1449, 14697), (1491, 14283), (1587, 13419), (1633, 13041), (1863, 11431), (1917, 11109), (3703, 5751), (4347, 4899), (4473, 4761)]