128756980

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{173}}^1\times {\mathrm{199}}^1$

素因数の和:409

約数の個数: 96

約数和(自身を含む): 315705600

約数和(自身を除く): 186948620

約数列:

[1, 2, 4, 5, 10, 11, 17, 20, 22, 34, 44, 55, 68, 85, 110, 170, 173, 187, 199, 220, 340, 346, 374, 398, 692, 748, 796, 865, 935, 995, 1730, 1870, 1903, 1990, 2189, 2941, 3383, 3460, 3740, 3806, 3980, 4378, 5882, 6766, 7612, 8756, 9515, 10945, 11764, 13532, 14705, 16915, 19030, 21890, 29410, 32351, 33830, 34427, 37213, 38060, 43780, 58820, 64702, 67660, 68854, 74426, 129404, 137708, 148852, 161755, 172135, 186065, 323510, 344270, 372130, 378697, 585259, 647020, 688540, 744260, 757394, 1170518, 1514788, 1893485, 2341036, 2926295, 3786970, 5852590, 6437849, 7573940, 11705180, 12875698, 25751396, 32189245, 64378490, 128756980]

約数ペア:

[(1, 128756980), (2, 64378490), (4, 32189245), (5, 25751396), (10, 12875698), (11, 11705180), (17, 7573940), (20, 6437849), (22, 5852590), (34, 3786970), (44, 2926295), (55, 2341036), (68, 1893485), (85, 1514788), (110, 1170518), (170, 757394), (173, 744260), (187, 688540), (199, 647020), (220, 585259), (340, 378697), (346, 372130), (374, 344270), (398, 323510), (692, 186065), (748, 172135), (796, 161755), (865, 148852), (935, 137708), (995, 129404), (1730, 74426), (1870, 68854), (1903, 67660), (1990, 64702), (2189, 58820), (2941, 43780), (3383, 38060), (3460, 37213), (3740, 34427), (3806, 33830), (3980, 32351), (4378, 29410), (5882, 21890), (6766, 19030), (7612, 16915), (8756, 14705), (9515, 13532), (10945, 11764)]