21870425

素因数分解:

$5^2\times {\mathrm{19}}^1\times {\mathrm{41}}^1\times {\mathrm{1123}}^1$

素因数の和:1193

約数の個数: 24

約数和(自身を含む): 29268960

約数和(自身を除く): 7398535

約数列:

[1, 5, 19, 25, 41, 95, 205, 475, 779, 1025, 1123, 3895, 5615, 19475, 21337, 28075, 46043, 106685, 230215, 533425, 874817, 1151075, 4374085, 21870425]

約数ペア:

[(1, 21870425), (5, 4374085), (19, 1151075), (25, 874817), (41, 533425), (95, 230215), (205, 106685), (475, 46043), (779, 28075), (1025, 21337), (1123, 19475), (3895, 5615)]