20780520800

素因数分解:

$2^5\times 5^2\times {\mathrm{13}}^1\times {\mathrm{1998127}}^1$

素因数の和:1998160

約数の個数: 72

約数和(自身を含む): 54632815776

約数和(自身を除く): 33852294976

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 25, 26, 32, 40, 50, 52, 65, 80, 100, 104, 130, 160, 200, 208, 260, 325, 400, 416, 520, 650, 800, 1040, 1300, 2080, 2600, 5200, 10400, 1998127, 3996254, 7992508, 9990635, 15985016, 19981270, 25975651, 31970032, 39962540, 49953175, 51951302, 63940064, 79925080, 99906350, 103902604, 129878255, 159850160, 199812700, 207805208, 259756510, 319700320, 399625400, 415610416, 519513020, 649391275, 799250800, 831220832, 1039026040, 1298782550, 1598501600, 2078052080, 2597565100, 4156104160, 5195130200, 10390260400, 20780520800]

約数ペア:

[(1, 20780520800), (2, 10390260400), (4, 5195130200), (5, 4156104160), (8, 2597565100), (10, 2078052080), (13, 1598501600), (16, 1298782550), (20, 1039026040), (25, 831220832), (26, 799250800), (32, 649391275), (40, 519513020), (50, 415610416), (52, 399625400), (65, 319700320), (80, 259756510), (100, 207805208), (104, 199812700), (130, 159850160), (160, 129878255), (200, 103902604), (208, 99906350), (260, 79925080), (325, 63940064), (400, 51951302), (416, 49953175), (520, 39962540), (650, 31970032), (800, 25975651), (1040, 19981270), (1300, 15985016), (2080, 9990635), (2600, 7992508), (5200, 3996254), (10400, 1998127)]