64990250

素因数分解:

$2^1\times 5^3\times {\mathrm{13}}^1\times {\mathrm{19997}}^1$

素因数の和:20027

約数の個数: 32

約数和(自身を含む): 131026896

約数和(自身を除く): 66036646

約数列:

[1, 2, 5, 10, 13, 25, 26, 50, 65, 125, 130, 250, 325, 650, 1625, 3250, 19997, 39994, 99985, 199970, 259961, 499925, 519922, 999850, 1299805, 2499625, 2599610, 4999250, 6499025, 12998050, 32495125, 64990250]

約数ペア:

[(1, 64990250), (2, 32495125), (5, 12998050), (10, 6499025), (13, 4999250), (25, 2599610), (26, 2499625), (50, 1299805), (65, 999850), (125, 519922), (130, 499925), (250, 259961), (325, 199970), (650, 99985), (1625, 39994), (3250, 19997)]