21388605

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{31}}^1\times {\mathrm{6571}}^1$

素因数の和:6617

約数の個数: 32

約数和(自身を含む): 40378368

約数和(自身を除く): 18989763

約数列:

[1, 3, 5, 7, 15, 21, 31, 35, 93, 105, 155, 217, 465, 651, 1085, 3255, 6571, 19713, 32855, 45997, 98565, 137991, 203701, 229985, 611103, 689955, 1018505, 1425907, 3055515, 4277721, 7129535, 21388605]

約数ペア:

[(1, 21388605), (3, 7129535), (5, 4277721), (7, 3055515), (15, 1425907), (21, 1018505), (31, 689955), (35, 611103), (93, 229985), (105, 203701), (155, 137991), (217, 98565), (465, 45997), (651, 32855), (1085, 19713), (3255, 6571)]