639421935

素因数分解:

$3^1\times 5^1\times {\mathrm{17}}^1\times {\mathrm{491}}^1\times {\mathrm{5107}}^1$

素因数の和:5623

約数の個数: 32

約数和(自身を含む): 1085674752

約数和(自身を除く): 446252817

約数列:

[1, 3, 5, 15, 17, 51, 85, 255, 491, 1473, 2455, 5107, 7365, 8347, 15321, 25041, 25535, 41735, 76605, 86819, 125205, 260457, 434095, 1302285, 2507537, 7522611, 12537685, 37613055, 42628129, 127884387, 213140645, 639421935]

約数ペア:

[(1, 639421935), (3, 213140645), (5, 127884387), (15, 42628129), (17, 37613055), (51, 12537685), (85, 7522611), (255, 2507537), (491, 1302285), (1473, 434095), (2455, 260457), (5107, 125205), (7365, 86819), (8347, 76605), (15321, 41735), (25041, 25535)]