81956560

素因数分解:

$2^4\times 5^1\times 7^1\times {\mathrm{31}}^1\times {\mathrm{4721}}^1$

素因数の和:4772

約数の個数: 80

約数和(自身を含む): 224842752

約数和(自身を除く): 142886192

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 31, 35, 40, 56, 62, 70, 80, 112, 124, 140, 155, 217, 248, 280, 310, 434, 496, 560, 620, 868, 1085, 1240, 1736, 2170, 2480, 3472, 4340, 4721, 8680, 9442, 17360, 18884, 23605, 33047, 37768, 47210, 66094, 75536, 94420, 132188, 146351, 165235, 188840, 264376, 292702, 330470, 377680, 528752, 585404, 660940, 731755, 1024457, 1170808, 1321880, 1463510, 2048914, 2341616, 2643760, 2927020, 4097828, 5122285, 5854040, 8195656, 10244570, 11708080, 16391312, 20489140, 40978280, 81956560]

約数ペア:

[(1, 81956560), (2, 40978280), (4, 20489140), (5, 16391312), (7, 11708080), (8, 10244570), (10, 8195656), (14, 5854040), (16, 5122285), (20, 4097828), (28, 2927020), (31, 2643760), (35, 2341616), (40, 2048914), (56, 1463510), (62, 1321880), (70, 1170808), (80, 1024457), (112, 731755), (124, 660940), (140, 585404), (155, 528752), (217, 377680), (248, 330470), (280, 292702), (310, 264376), (434, 188840), (496, 165235), (560, 146351), (620, 132188), (868, 94420), (1085, 75536), (1240, 66094), (1736, 47210), (2170, 37768), (2480, 33047), (3472, 23605), (4340, 18884), (4721, 17360), (8680, 9442)]