80817520

素因数分解:

$2^4\times 5^1\times 7^1\times {\mathrm{277}}^1\times {\mathrm{521}}^1$

素因数の和:818

約数の個数: 80

約数和(自身を含む): 215932608

約数和(自身を除く): 135115088

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 35, 40, 56, 70, 80, 112, 140, 277, 280, 521, 554, 560, 1042, 1108, 1385, 1939, 2084, 2216, 2605, 2770, 3647, 3878, 4168, 4432, 5210, 5540, 7294, 7756, 8336, 9695, 10420, 11080, 14588, 15512, 18235, 19390, 20840, 22160, 29176, 31024, 36470, 38780, 41680, 58352, 72940, 77560, 144317, 145880, 155120, 288634, 291760, 577268, 721585, 1010219, 1154536, 1443170, 2020438, 2309072, 2886340, 4040876, 5051095, 5772680, 8081752, 10102190, 11545360, 16163504, 20204380, 40408760, 80817520]

約数ペア:

[(1, 80817520), (2, 40408760), (4, 20204380), (5, 16163504), (7, 11545360), (8, 10102190), (10, 8081752), (14, 5772680), (16, 5051095), (20, 4040876), (28, 2886340), (35, 2309072), (40, 2020438), (56, 1443170), (70, 1154536), (80, 1010219), (112, 721585), (140, 577268), (277, 291760), (280, 288634), (521, 155120), (554, 145880), (560, 144317), (1042, 77560), (1108, 72940), (1385, 58352), (1939, 41680), (2084, 38780), (2216, 36470), (2605, 31024), (2770, 29176), (3647, 22160), (3878, 20840), (4168, 19390), (4432, 18235), (5210, 15512), (5540, 14588), (7294, 11080), (7756, 10420), (8336, 9695)]