639403210

素因数分解:

$2^1\times 5^1\times {\mathrm{31}}^1\times {\mathrm{193}}^1\times {\mathrm{10687}}^1$

素因数の和:10918

約数の個数: 32

約数和(自身を含む): 1194319872

約数和(自身を除く): 554916662

約数列:

[1, 2, 5, 10, 31, 62, 155, 193, 310, 386, 965, 1930, 5983, 10687, 11966, 21374, 29915, 53435, 59830, 106870, 331297, 662594, 1656485, 2062591, 3312970, 4125182, 10312955, 20625910, 63940321, 127880642, 319701605, 639403210]

約数ペア:

[(1, 639403210), (2, 319701605), (5, 127880642), (10, 63940321), (31, 20625910), (62, 10312955), (155, 4125182), (193, 3312970), (310, 2062591), (386, 1656485), (965, 662594), (1930, 331297), (5983, 106870), (10687, 59830), (11966, 53435), (21374, 29915)]