20951511

素因数分解:

$3^1\times 7^1\times {\mathrm{73}}^1\times {\mathrm{79}}^1\times {\mathrm{173}}^1$

素因数の和:335

約数の個数: 32

約数和(自身を含む): 32962560

約数和(自身を除く): 12011049

約数列:

[1, 3, 7, 21, 73, 79, 173, 219, 237, 511, 519, 553, 1211, 1533, 1659, 3633, 5767, 12629, 13667, 17301, 37887, 40369, 41001, 88403, 95669, 121107, 265209, 287007, 997691, 2993073, 6983837, 20951511]

約数ペア:

[(1, 20951511), (3, 6983837), (7, 2993073), (21, 997691), (73, 287007), (79, 265209), (173, 121107), (219, 95669), (237, 88403), (511, 41001), (519, 40369), (553, 37887), (1211, 17301), (1533, 13667), (1659, 12629), (3633, 5767)]