21367556

素因数分解:

$2^2\times 7^1\times {\mathrm{31}}^1\times {\mathrm{103}}^1\times {\mathrm{239}}^1$

素因数の和:384

約数の個数: 48

約数和(自身を含む): 44728320

約数和(自身を除く): 23360764

約数列:

[1, 2, 4, 7, 14, 28, 31, 62, 103, 124, 206, 217, 239, 412, 434, 478, 721, 868, 956, 1442, 1673, 2884, 3193, 3346, 6386, 6692, 7409, 12772, 14818, 22351, 24617, 29636, 44702, 49234, 51863, 89404, 98468, 103726, 172319, 207452, 344638, 689276, 763127, 1526254, 3052508, 5341889, 10683778, 21367556]

約数ペア:

[(1, 21367556), (2, 10683778), (4, 5341889), (7, 3052508), (14, 1526254), (28, 763127), (31, 689276), (62, 344638), (103, 207452), (124, 172319), (206, 103726), (217, 98468), (239, 89404), (412, 51863), (434, 49234), (478, 44702), (721, 29636), (868, 24617), (956, 22351), (1442, 14818), (1673, 12772), (2884, 7409), (3193, 6692), (3346, 6386)]