21640821

素因数分解:

$3^1\times {\mathrm{31}}^1\times {\mathrm{47}}^1\times {\mathrm{4951}}^1$

素因数の和:5032

約数の個数: 16

約数和(自身を含む): 30425088

約数和(自身を除く): 8784267

約数列:

[1, 3, 31, 47, 93, 141, 1457, 4371, 4951, 14853, 153481, 232697, 460443, 698091, 7213607, 21640821]

約数ペア:

[(1, 21640821), (3, 7213607), (31, 698091), (47, 460443), (93, 232697), (141, 153481), (1457, 14853), (4371, 4951)]