19938750

素因数分解:

$2^1\times 3^1\times 5^4\times {\mathrm{13}}^1\times {\mathrm{409}}^1$

素因数の和:447

約数の個数: 80

約数和(自身を含む): 53795280

約数和(自身を除く): 33856530

約数列:

[1, 2, 3, 5, 6, 10, 13, 15, 25, 26, 30, 39, 50, 65, 75, 78, 125, 130, 150, 195, 250, 325, 375, 390, 409, 625, 650, 750, 818, 975, 1227, 1250, 1625, 1875, 1950, 2045, 2454, 3250, 3750, 4090, 4875, 5317, 6135, 8125, 9750, 10225, 10634, 12270, 15951, 16250, 20450, 24375, 26585, 30675, 31902, 48750, 51125, 53170, 61350, 79755, 102250, 132925, 153375, 159510, 255625, 265850, 306750, 398775, 511250, 664625, 766875, 797550, 1329250, 1533750, 1993875, 3323125, 3987750, 6646250, 9969375, 19938750]

約数ペア:

[(1, 19938750), (2, 9969375), (3, 6646250), (5, 3987750), (6, 3323125), (10, 1993875), (13, 1533750), (15, 1329250), (25, 797550), (26, 766875), (30, 664625), (39, 511250), (50, 398775), (65, 306750), (75, 265850), (78, 255625), (125, 159510), (130, 153375), (150, 132925), (195, 102250), (250, 79755), (325, 61350), (375, 53170), (390, 51125), (409, 48750), (625, 31902), (650, 30675), (750, 26585), (818, 24375), (975, 20450), (1227, 16250), (1250, 15951), (1625, 12270), (1875, 10634), (1950, 10225), (2045, 9750), (2454, 8125), (3250, 6135), (3750, 5317), (4090, 4875)]