78775640

素因数分解:

$2^3\times 5^1\times {\mathrm{79}}^1\times {\mathrm{97}}^1\times {\mathrm{257}}^1$

素因数の和:444

約数の個数: 64

約数和(自身を含む): 182044800

約数和(自身を除く): 103269160

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 79, 97, 158, 194, 257, 316, 388, 395, 485, 514, 632, 776, 790, 970, 1028, 1285, 1580, 1940, 2056, 2570, 3160, 3880, 5140, 7663, 10280, 15326, 20303, 24929, 30652, 38315, 40606, 49858, 61304, 76630, 81212, 99716, 101515, 124645, 153260, 162424, 199432, 203030, 249290, 306520, 406060, 498580, 812120, 997160, 1969391, 3938782, 7877564, 9846955, 15755128, 19693910, 39387820, 78775640]

約数ペア:

[(1, 78775640), (2, 39387820), (4, 19693910), (5, 15755128), (8, 9846955), (10, 7877564), (20, 3938782), (40, 1969391), (79, 997160), (97, 812120), (158, 498580), (194, 406060), (257, 306520), (316, 249290), (388, 203030), (395, 199432), (485, 162424), (514, 153260), (632, 124645), (776, 101515), (790, 99716), (970, 81212), (1028, 76630), (1285, 61304), (1580, 49858), (1940, 40606), (2056, 38315), (2570, 30652), (3160, 24929), (3880, 20303), (5140, 15326), (7663, 10280)]