125678120

素因数分解:

$2^3\times 5^1\times {\mathrm{41}}^1\times {\mathrm{197}}^1\times {\mathrm{389}}^1$

素因数の和:638

約数の個数: 64

約数和(自身を含む): 291891600

約数和(自身を除く): 166213480

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 41, 82, 164, 197, 205, 328, 389, 394, 410, 778, 788, 820, 985, 1556, 1576, 1640, 1945, 1970, 3112, 3890, 3940, 7780, 7880, 8077, 15560, 15949, 16154, 31898, 32308, 40385, 63796, 64616, 76633, 79745, 80770, 127592, 153266, 159490, 161540, 306532, 318980, 323080, 383165, 613064, 637960, 766330, 1532660, 3065320, 3141953, 6283906, 12567812, 15709765, 25135624, 31419530, 62839060, 125678120]

約数ペア:

[(1, 125678120), (2, 62839060), (4, 31419530), (5, 25135624), (8, 15709765), (10, 12567812), (20, 6283906), (40, 3141953), (41, 3065320), (82, 1532660), (164, 766330), (197, 637960), (205, 613064), (328, 383165), (389, 323080), (394, 318980), (410, 306532), (778, 161540), (788, 159490), (820, 153266), (985, 127592), (1556, 80770), (1576, 79745), (1640, 76633), (1945, 64616), (1970, 63796), (3112, 40385), (3890, 32308), (3940, 31898), (7780, 16154), (7880, 15949), (8077, 15560)]