257668280

素因数分解:

$2^3\times 5^1\times {\mathrm{31}}^1\times {\mathrm{207797}}^1$

素因数の和:207839

約数の個数: 32

約数和(自身を含む): 598458240

約数和(自身を除く): 340789960

約数列:

[1, 2, 4, 5, 8, 10, 20, 31, 40, 62, 124, 155, 248, 310, 620, 1240, 207797, 415594, 831188, 1038985, 1662376, 2077970, 4155940, 6441707, 8311880, 12883414, 25766828, 32208535, 51533656, 64417070, 128834140, 257668280]

約数ペア:

[(1, 257668280), (2, 128834140), (4, 64417070), (5, 51533656), (8, 32208535), (10, 25766828), (20, 12883414), (31, 8311880), (40, 6441707), (62, 4155940), (124, 2077970), (155, 1662376), (248, 1038985), (310, 831188), (620, 415594), (1240, 207797)]