81171580

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{29}}^1\times {\mathrm{19993}}^1$

素因数の和:20038

約数の個数: 48

約数和(自身を含む): 201539520

約数和(自身を除く): 120367940

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 29, 35, 58, 70, 116, 140, 145, 203, 290, 406, 580, 812, 1015, 2030, 4060, 19993, 39986, 79972, 99965, 139951, 199930, 279902, 399860, 559804, 579797, 699755, 1159594, 1399510, 2319188, 2799020, 2898985, 4058579, 5797970, 8117158, 11595940, 16234316, 20292895, 40585790, 81171580]

約数ペア:

[(1, 81171580), (2, 40585790), (4, 20292895), (5, 16234316), (7, 11595940), (10, 8117158), (14, 5797970), (20, 4058579), (28, 2898985), (29, 2799020), (35, 2319188), (58, 1399510), (70, 1159594), (116, 699755), (140, 579797), (145, 559804), (203, 399860), (290, 279902), (406, 199930), (580, 139951), (812, 99965), (1015, 79972), (2030, 39986), (4060, 19993)]