81916940

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{293}}^1\times {\mathrm{1997}}^1$

素因数の和:2306

約数の個数: 48

約数和(自身を含む): 197370432

約数和(自身を除く): 115453492

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 293, 586, 1172, 1465, 1997, 2051, 2930, 3994, 4102, 5860, 7988, 8204, 9985, 10255, 13979, 19970, 20510, 27958, 39940, 41020, 55916, 69895, 139790, 279580, 585121, 1170242, 2340484, 2925605, 4095847, 5851210, 8191694, 11702420, 16383388, 20479235, 40958470, 81916940]

約数ペア:

[(1, 81916940), (2, 40958470), (4, 20479235), (5, 16383388), (7, 11702420), (10, 8191694), (14, 5851210), (20, 4095847), (28, 2925605), (35, 2340484), (70, 1170242), (140, 585121), (293, 279580), (586, 139790), (1172, 69895), (1465, 55916), (1997, 41020), (2051, 39940), (2930, 27958), (3994, 20510), (4102, 19970), (5860, 13979), (7988, 10255), (8204, 9985)]