20523750

素因数分解:

$2^1\times 3^1\times 5^4\times {\mathrm{13}}^1\times {\mathrm{421}}^1$

素因数の和:459

約数の個数: 80

約数和(自身を含む): 55369776

約数和(自身を除く): 34846026

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, 421, 625, 650, 750, 842, 975, 1250, 1263, 1625, 1875, 1950, 2105, 2526, 3250, 3750, 4210, 4875, 5473, 6315, 8125, 9750, 10525, 10946, 12630, 16250, 16419, 21050, 24375, 27365, 31575, 32838, 48750, 52625, 54730, 63150, 82095, 105250, 136825, 157875, 164190, 263125, 273650, 315750, 410475, 526250, 684125, 789375, 820950, 1368250, 1578750, 2052375, 3420625, 4104750, 6841250, 10261875, 20523750]

約数ペア:

[(1, 20523750), (2, 10261875), (3, 6841250), (5, 4104750), (6, 3420625), (10, 2052375), (13, 1578750), (15, 1368250), (25, 820950), (26, 789375), (30, 684125), (39, 526250), (50, 410475), (65, 315750), (75, 273650), (78, 263125), (125, 164190), (130, 157875), (150, 136825), (195, 105250), (250, 82095), (325, 63150), (375, 54730), (390, 52625), (421, 48750), (625, 32838), (650, 31575), (750, 27365), (842, 24375), (975, 21050), (1250, 16419), (1263, 16250), (1625, 12630), (1875, 10946), (1950, 10525), (2105, 9750), (2526, 8125), (3250, 6315), (3750, 5473), (4210, 4875)]