81567920

素因数分解:

$2^4\times 5^1\times 7^1\times {\mathrm{113}}^1\times {\mathrm{1289}}^1$

素因数の和:1422

約数の個数: 80

約数和(自身を含む): 218825280

約数和(自身を除く): 137257360

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 35, 40, 56, 70, 80, 112, 113, 140, 226, 280, 452, 560, 565, 791, 904, 1130, 1289, 1582, 1808, 2260, 2578, 3164, 3955, 4520, 5156, 6328, 6445, 7910, 9023, 9040, 10312, 12656, 12890, 15820, 18046, 20624, 25780, 31640, 36092, 45115, 51560, 63280, 72184, 90230, 103120, 144368, 145657, 180460, 291314, 360920, 582628, 721840, 728285, 1019599, 1165256, 1456570, 2039198, 2330512, 2913140, 4078396, 5097995, 5826280, 8156792, 10195990, 11652560, 16313584, 20391980, 40783960, 81567920]

約数ペア:

[(1, 81567920), (2, 40783960), (4, 20391980), (5, 16313584), (7, 11652560), (8, 10195990), (10, 8156792), (14, 5826280), (16, 5097995), (20, 4078396), (28, 2913140), (35, 2330512), (40, 2039198), (56, 1456570), (70, 1165256), (80, 1019599), (112, 728285), (113, 721840), (140, 582628), (226, 360920), (280, 291314), (452, 180460), (560, 145657), (565, 144368), (791, 103120), (904, 90230), (1130, 72184), (1289, 63280), (1582, 51560), (1808, 45115), (2260, 36092), (2578, 31640), (3164, 25780), (3955, 20624), (4520, 18046), (5156, 15820), (6328, 12890), (6445, 12656), (7910, 10312), (9023, 9040)]