638961897

素因数分解:

$3^1\times 7^1\times {\mathrm{43}}^1\times {\mathrm{157}}^1\times {\mathrm{4507}}^1$

素因数の和:4717

約数の個数: 32

約数和(自身を含む): 1002867712

約数和(自身を除く): 363905815

約数列:

[1, 3, 7, 21, 43, 129, 157, 301, 471, 903, 1099, 3297, 4507, 6751, 13521, 20253, 31549, 47257, 94647, 141771, 193801, 581403, 707599, 1356607, 2122797, 4069821, 4953193, 14859579, 30426757, 91280271, 212987299, 638961897]

約数ペア:

[(1, 638961897), (3, 212987299), (7, 91280271), (21, 30426757), (43, 14859579), (129, 4953193), (157, 4069821), (301, 2122797), (471, 1356607), (903, 707599), (1099, 581403), (3297, 193801), (4507, 141771), (6751, 94647), (13521, 47257), (20253, 31549)]