18790821

素因数分解:

$3^2\times 7^1\times {\mathrm{461}}^1\times {\mathrm{647}}^1$

素因数の和:1121

約数の個数: 24

約数和(自身を含む): 31135104

約数和(自身を除く): 12344283

約数列:

[1, 3, 7, 9, 21, 63, 461, 647, 1383, 1941, 3227, 4149, 4529, 5823, 9681, 13587, 29043, 40761, 298267, 894801, 2087869, 2684403, 6263607, 18790821]

約数ペア:

[(1, 18790821), (3, 6263607), (7, 2684403), (9, 2087869), (21, 894801), (63, 298267), (461, 40761), (647, 29043), (1383, 13587), (1941, 9681), (3227, 5823), (4149, 4529)]