405767440

素因数分解:

$2^4\times 5^1\times {\mathrm{13}}^1\times {\mathrm{390161}}^1$

素因数の和:390187

約数の個数: 40

約数和(自身を含む): 1015981848

約数和(自身を除く): 610214408

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 40, 52, 65, 80, 104, 130, 208, 260, 520, 1040, 390161, 780322, 1560644, 1950805, 3121288, 3901610, 5072093, 6242576, 7803220, 10144186, 15606440, 20288372, 25360465, 31212880, 40576744, 50720930, 81153488, 101441860, 202883720, 405767440]

約数ペア:

[(1, 405767440), (2, 202883720), (4, 101441860), (5, 81153488), (8, 50720930), (10, 40576744), (13, 31212880), (16, 25360465), (20, 20288372), (26, 15606440), (40, 10144186), (52, 7803220), (65, 6242576), (80, 5072093), (104, 3901610), (130, 3121288), (208, 1950805), (260, 1560644), (520, 780322), (1040, 390161)]