639246040

素因数分解:

$2^3\times 5^1\times {\mathrm{31}}^1\times {\mathrm{37}}^1\times {\mathrm{13933}}^1$

素因数の和:14012

約数の個数: 64

約数和(自身を含む): 1524936960

約数和(自身を除く): 885690920

約数列:

[1, 2, 4, 5, 8, 10, 20, 31, 37, 40, 62, 74, 124, 148, 155, 185, 248, 296, 310, 370, 620, 740, 1147, 1240, 1480, 2294, 4588, 5735, 9176, 11470, 13933, 22940, 27866, 45880, 55732, 69665, 111464, 139330, 278660, 431923, 515521, 557320, 863846, 1031042, 1727692, 2062084, 2159615, 2577605, 3455384, 4124168, 4319230, 5155210, 8638460, 10310420, 15981151, 17276920, 20620840, 31962302, 63924604, 79905755, 127849208, 159811510, 319623020, 639246040]

約数ペア:

[(1, 639246040), (2, 319623020), (4, 159811510), (5, 127849208), (8, 79905755), (10, 63924604), (20, 31962302), (31, 20620840), (37, 17276920), (40, 15981151), (62, 10310420), (74, 8638460), (124, 5155210), (148, 4319230), (155, 4124168), (185, 3455384), (248, 2577605), (296, 2159615), (310, 2062084), (370, 1727692), (620, 1031042), (740, 863846), (1147, 557320), (1240, 515521), (1480, 431923), (2294, 278660), (4588, 139330), (5735, 111464), (9176, 69665), (11470, 55732), (13933, 45880), (22940, 27866)]