20378800

素因数分解:

$2^4\times 5^2\times {\mathrm{13}}^1\times {\mathrm{3919}}^1$

素因数の和:3950

約数の個数: 60

約数和(自身を含む): 52739680

約数和(自身を除く): 32360880

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 25, 26, 40, 50, 52, 65, 80, 100, 104, 130, 200, 208, 260, 325, 400, 520, 650, 1040, 1300, 2600, 3919, 5200, 7838, 15676, 19595, 31352, 39190, 50947, 62704, 78380, 97975, 101894, 156760, 195950, 203788, 254735, 313520, 391900, 407576, 509470, 783800, 815152, 1018940, 1273675, 1567600, 2037880, 2547350, 4075760, 5094700, 10189400, 20378800]

約数ペア:

[(1, 20378800), (2, 10189400), (4, 5094700), (5, 4075760), (8, 2547350), (10, 2037880), (13, 1567600), (16, 1273675), (20, 1018940), (25, 815152), (26, 783800), (40, 509470), (50, 407576), (52, 391900), (65, 313520), (80, 254735), (100, 203788), (104, 195950), (130, 156760), (200, 101894), (208, 97975), (260, 78380), (325, 62704), (400, 50947), (520, 39190), (650, 31352), (1040, 19595), (1300, 15676), (2600, 7838), (3919, 5200)]