78287800

素因数分解:

$2^3\times 5^2\times {\mathrm{197}}^1\times {\mathrm{1987}}^1$

素因数の和:2200

約数の個数: 48

約数和(自身を含む): 183035160

約数和(自身を除く): 104747360

約数列:

[1, 2, 4, 5, 8, 10, 20, 25, 40, 50, 100, 197, 200, 394, 788, 985, 1576, 1970, 1987, 3940, 3974, 4925, 7880, 7948, 9850, 9935, 15896, 19700, 19870, 39400, 39740, 49675, 79480, 99350, 198700, 391439, 397400, 782878, 1565756, 1957195, 3131512, 3914390, 7828780, 9785975, 15657560, 19571950, 39143900, 78287800]

約数ペア:

[(1, 78287800), (2, 39143900), (4, 19571950), (5, 15657560), (8, 9785975), (10, 7828780), (20, 3914390), (25, 3131512), (40, 1957195), (50, 1565756), (100, 782878), (197, 397400), (200, 391439), (394, 198700), (788, 99350), (985, 79480), (1576, 49675), (1970, 39740), (1987, 39400), (3940, 19870), (3974, 19700), (4925, 15896), (7880, 9935), (7948, 9850)]