21787647

素因数分解:

$3^1\times 7^1\times {\mathrm{23}}^1\times {\mathrm{79}}^1\times {\mathrm{571}}^1$

素因数の和:683

約数の個数: 32

約数和(自身を含む): 35143680

約数和(自身を除く): 13356033

約数列:

[1, 3, 7, 21, 23, 69, 79, 161, 237, 483, 553, 571, 1659, 1713, 1817, 3997, 5451, 11991, 12719, 13133, 38157, 39399, 45109, 91931, 135327, 275793, 315763, 947289, 1037507, 3112521, 7262549, 21787647]

約数ペア:

[(1, 21787647), (3, 7262549), (7, 3112521), (21, 1037507), (23, 947289), (69, 315763), (79, 275793), (161, 135327), (237, 91931), (483, 45109), (553, 39399), (571, 38157), (1659, 13133), (1713, 12719), (1817, 11991), (3997, 5451)]