20644000

素因数分解:

$2^5\times 5^3\times {\mathrm{13}}^1\times {\mathrm{397}}^1$

素因数の和:435

約数の個数: 96

約数和(自身を含む): 54761616

約数和(自身を除く): 34117616

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 25, 26, 32, 40, 50, 52, 65, 80, 100, 104, 125, 130, 160, 200, 208, 250, 260, 325, 397, 400, 416, 500, 520, 650, 794, 800, 1000, 1040, 1300, 1588, 1625, 1985, 2000, 2080, 2600, 3176, 3250, 3970, 4000, 5161, 5200, 6352, 6500, 7940, 9925, 10322, 10400, 12704, 13000, 15880, 19850, 20644, 25805, 26000, 31760, 39700, 41288, 49625, 51610, 52000, 63520, 79400, 82576, 99250, 103220, 129025, 158800, 165152, 198500, 206440, 258050, 317600, 397000, 412880, 516100, 645125, 794000, 825760, 1032200, 1290250, 1588000, 2064400, 2580500, 4128800, 5161000, 10322000, 20644000]

約数ペア:

[(1, 20644000), (2, 10322000), (4, 5161000), (5, 4128800), (8, 2580500), (10, 2064400), (13, 1588000), (16, 1290250), (20, 1032200), (25, 825760), (26, 794000), (32, 645125), (40, 516100), (50, 412880), (52, 397000), (65, 317600), (80, 258050), (100, 206440), (104, 198500), (125, 165152), (130, 158800), (160, 129025), (200, 103220), (208, 99250), (250, 82576), (260, 79400), (325, 63520), (397, 52000), (400, 51610), (416, 49625), (500, 41288), (520, 39700), (650, 31760), (794, 26000), (800, 25805), (1000, 20644), (1040, 19850), (1300, 15880), (1588, 13000), (1625, 12704), (1985, 10400), (2000, 10322), (2080, 9925), (2600, 7940), (3176, 6500), (3250, 6352), (3970, 5200), (4000, 5161)]