51388840

素因数分解:

$2^3\times 5^1\times {\mathrm{61}}^1\times {\mathrm{21061}}^1$

素因数の和:21133

約数の個数: 32

約数和(自身を含む): 117525960

約数和(自身を除く): 66137120

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 61, 122, 244, 305, 488, 610, 1220, 2440, 21061, 42122, 84244, 105305, 168488, 210610, 421220, 842440, 1284721, 2569442, 5138884, 6423605, 10277768, 12847210, 25694420, 51388840]

約数ペア:

[(1, 51388840), (2, 25694420), (4, 12847210), (5, 10277768), (8, 6423605), (10, 5138884), (20, 2569442), (40, 1284721), (61, 842440), (122, 421220), (244, 210610), (305, 168488), (488, 105305), (610, 84244), (1220, 42122), (2440, 21061)]