21208815

素因数分解:

$3^2\times 5^1\times {\mathrm{179}}^1\times {\mathrm{2633}}^1$

素因数の和:2823

約数の個数: 24

約数和(自身を含む): 36981360

約数和(自身を除く): 15772545

約数列:

[1, 3, 5, 9, 15, 45, 179, 537, 895, 1611, 2633, 2685, 7899, 8055, 13165, 23697, 39495, 118485, 471307, 1413921, 2356535, 4241763, 7069605, 21208815]

約数ペア:

[(1, 21208815), (3, 7069605), (5, 4241763), (9, 2356535), (15, 1413921), (45, 471307), (179, 118485), (537, 39495), (895, 23697), (1611, 13165), (2633, 8055), (2685, 7899)]