20157800

素因数分解:

$2^3\times 5^2\times {\mathrm{13}}^1\times {\mathrm{7753}}^1$

素因数の和:7782

約数の個数: 48

約数和(自身を含む): 50478540

約数和(自身を除く): 30320740

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 25, 26, 40, 50, 52, 65, 100, 104, 130, 200, 260, 325, 520, 650, 1300, 2600, 7753, 15506, 31012, 38765, 62024, 77530, 100789, 155060, 193825, 201578, 310120, 387650, 403156, 503945, 775300, 806312, 1007890, 1550600, 2015780, 2519725, 4031560, 5039450, 10078900, 20157800]

約数ペア:

[(1, 20157800), (2, 10078900), (4, 5039450), (5, 4031560), (8, 2519725), (10, 2015780), (13, 1550600), (20, 1007890), (25, 806312), (26, 775300), (40, 503945), (50, 403156), (52, 387650), (65, 310120), (100, 201578), (104, 193825), (130, 155060), (200, 100789), (260, 77530), (325, 62024), (520, 38765), (650, 31012), (1300, 15506), (2600, 7753)]