81817215

素因数分解:

$3^1\times 5^1\times {\mathrm{31}}^1\times {\mathrm{251}}^1\times {\mathrm{701}}^1$

素因数の和:991

約数の個数: 32

約数和(自身を含む): 135862272

約数和(自身を除く): 54045057

約数列:

[1, 3, 5, 15, 31, 93, 155, 251, 465, 701, 753, 1255, 2103, 3505, 3765, 7781, 10515, 21731, 23343, 38905, 65193, 108655, 116715, 175951, 325965, 527853, 879755, 2639265, 5454481, 16363443, 27272405, 81817215]

約数ペア:

[(1, 81817215), (3, 27272405), (5, 16363443), (15, 5454481), (31, 2639265), (93, 879755), (155, 527853), (251, 325965), (465, 175951), (701, 116715), (753, 108655), (1255, 65193), (2103, 38905), (3505, 23343), (3765, 21731), (7781, 10515)]