81403280

素因数分解:

$2^4\times 5^1\times 7^1\times {\mathrm{61}}^1\times {\mathrm{2383}}^1$

素因数の和:2464

約数の個数: 80

約数和(自身を含む): 219938304

約数和(自身を除く): 138535024

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 35, 40, 56, 61, 70, 80, 112, 122, 140, 244, 280, 305, 427, 488, 560, 610, 854, 976, 1220, 1708, 2135, 2383, 2440, 3416, 4270, 4766, 4880, 6832, 8540, 9532, 11915, 16681, 17080, 19064, 23830, 33362, 34160, 38128, 47660, 66724, 83405, 95320, 133448, 145363, 166810, 190640, 266896, 290726, 333620, 581452, 667240, 726815, 1017541, 1162904, 1334480, 1453630, 2035082, 2325808, 2907260, 4070164, 5087705, 5814520, 8140328, 10175410, 11629040, 16280656, 20350820, 40701640, 81403280]

約数ペア:

[(1, 81403280), (2, 40701640), (4, 20350820), (5, 16280656), (7, 11629040), (8, 10175410), (10, 8140328), (14, 5814520), (16, 5087705), (20, 4070164), (28, 2907260), (35, 2325808), (40, 2035082), (56, 1453630), (61, 1334480), (70, 1162904), (80, 1017541), (112, 726815), (122, 667240), (140, 581452), (244, 333620), (280, 290726), (305, 266896), (427, 190640), (488, 166810), (560, 145363), (610, 133448), (854, 95320), (976, 83405), (1220, 66724), (1708, 47660), (2135, 38128), (2383, 34160), (2440, 33362), (3416, 23830), (4270, 19064), (4766, 17080), (4880, 16681), (6832, 11915), (8540, 9532)]