21460971

素因数分解:

$3^1\times 7^2\times {\mathrm{67}}^1\times {\mathrm{2179}}^1$

素因数の和:2263

約数の個数: 24

約数和(自身を含む): 33798720

約数和(自身を除く): 12337749

約数列:

[1, 3, 7, 21, 49, 67, 147, 201, 469, 1407, 2179, 3283, 6537, 9849, 15253, 45759, 106771, 145993, 320313, 437979, 1021951, 3065853, 7153657, 21460971]

約数ペア:

[(1, 21460971), (3, 7153657), (7, 3065853), (21, 1021951), (49, 437979), (67, 320313), (147, 145993), (201, 106771), (469, 45759), (1407, 15253), (2179, 9849), (3283, 6537)]