21221404

素因数分解:

$2^2\times {\mathrm{19}}^1\times {\mathrm{293}}^1\times {\mathrm{953}}^1$

素因数の和:1269

約数の個数: 24

約数和(自身を含む): 39266640

約数和(自身を除く): 18045236

約数列:

[1, 2, 4, 19, 38, 76, 293, 586, 953, 1172, 1906, 3812, 5567, 11134, 18107, 22268, 36214, 72428, 279229, 558458, 1116916, 5305351, 10610702, 21221404]

約数ペア:

[(1, 21221404), (2, 10610702), (4, 5305351), (19, 1116916), (38, 558458), (76, 279229), (293, 72428), (586, 36214), (953, 22268), (1172, 18107), (1906, 11134), (3812, 5567)]