21501505

素因数分解:

$5^1\times {\mathrm{43}}^1\times {\mathrm{97}}^1\times {\mathrm{1031}}^1$

素因数の和:1176

約数の個数: 16

約数和(自身を含む): 26699904

約数和(自身を除く): 5198399

約数列:

[1, 5, 43, 97, 215, 485, 1031, 4171, 5155, 20855, 44333, 100007, 221665, 500035, 4300301, 21501505]

約数ペア:

[(1, 21501505), (5, 4300301), (43, 500035), (97, 221665), (215, 100007), (485, 44333), (1031, 20855), (4171, 5155)]