21221004

素因数分解:

$2^2\times 3^1\times 7^1\times {\mathrm{257}}^1\times {\mathrm{983}}^1$

素因数の和:1254

約数の個数: 48

約数和(自身を含む): 56867328

約数和(自身を除く): 35646324

約数列:

[1, 2, 3, 4, 6, 7, 12, 14, 21, 28, 42, 84, 257, 514, 771, 983, 1028, 1542, 1799, 1966, 2949, 3084, 3598, 3932, 5397, 5898, 6881, 7196, 10794, 11796, 13762, 20643, 21588, 27524, 41286, 82572, 252631, 505262, 757893, 1010524, 1515786, 1768417, 3031572, 3536834, 5305251, 7073668, 10610502, 21221004]

約数ペア:

[(1, 21221004), (2, 10610502), (3, 7073668), (4, 5305251), (6, 3536834), (7, 3031572), (12, 1768417), (14, 1515786), (21, 1010524), (28, 757893), (42, 505262), (84, 252631), (257, 82572), (514, 41286), (771, 27524), (983, 21588), (1028, 20643), (1542, 13762), (1799, 11796), (1966, 10794), (2949, 7196), (3084, 6881), (3598, 5898), (3932, 5397)]