21907977

素因数分解:

$3^1\times 7^1\times {\mathrm{13}}^2\times {\mathrm{6173}}^1$

素因数の和:6209

約数の個数: 24

約数和(自身を含む): 36154944

約数和(自身を除く): 14246967

約数列:

[1, 3, 7, 13, 21, 39, 91, 169, 273, 507, 1183, 3549, 6173, 18519, 43211, 80249, 129633, 240747, 561743, 1043237, 1685229, 3129711, 7302659, 21907977]

約数ペア:

[(1, 21907977), (3, 7302659), (7, 3129711), (13, 1685229), (21, 1043237), (39, 561743), (91, 240747), (169, 129633), (273, 80249), (507, 43211), (1183, 18519), (3549, 6173)]