20516280

素因数分解:

$2^3\times 3^1\times 5^1\times {\mathrm{17}}^1\times {\mathrm{89}}^1\times {\mathrm{113}}^1$

素因数の和:233

約数の個数: 128

約数和(自身を含む): 66484800

約数和(自身を除く): 45968520

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 17, 20, 24, 30, 34, 40, 51, 60, 68, 85, 89, 102, 113, 120, 136, 170, 178, 204, 226, 255, 267, 339, 340, 356, 408, 445, 452, 510, 534, 565, 678, 680, 712, 890, 904, 1020, 1068, 1130, 1335, 1356, 1513, 1695, 1780, 1921, 2040, 2136, 2260, 2670, 2712, 3026, 3390, 3560, 3842, 4520, 4539, 5340, 5763, 6052, 6780, 7565, 7684, 9078, 9605, 10057, 10680, 11526, 12104, 13560, 15130, 15368, 18156, 19210, 20114, 22695, 23052, 28815, 30171, 30260, 36312, 38420, 40228, 45390, 46104, 50285, 57630, 60342, 60520, 76840, 80456, 90780, 100570, 115260, 120684, 150855, 170969, 181560, 201140, 230520, 241368, 301710, 341938, 402280, 512907, 603420, 683876, 854845, 1025814, 1206840, 1367752, 1709690, 2051628, 2564535, 3419380, 4103256, 5129070, 6838760, 10258140, 20516280]

約数ペア:

[(1, 20516280), (2, 10258140), (3, 6838760), (4, 5129070), (5, 4103256), (6, 3419380), (8, 2564535), (10, 2051628), (12, 1709690), (15, 1367752), (17, 1206840), (20, 1025814), (24, 854845), (30, 683876), (34, 603420), (40, 512907), (51, 402280), (60, 341938), (68, 301710), (85, 241368), (89, 230520), (102, 201140), (113, 181560), (120, 170969), (136, 150855), (170, 120684), (178, 115260), (204, 100570), (226, 90780), (255, 80456), (267, 76840), (339, 60520), (340, 60342), (356, 57630), (408, 50285), (445, 46104), (452, 45390), (510, 40228), (534, 38420), (565, 36312), (678, 30260), (680, 30171), (712, 28815), (890, 23052), (904, 22695), (1020, 20114), (1068, 19210), (1130, 18156), (1335, 15368), (1356, 15130), (1513, 13560), (1695, 12104), (1780, 11526), (1921, 10680), (2040, 10057), (2136, 9605), (2260, 9078), (2670, 7684), (2712, 7565), (3026, 6780), (3390, 6052), (3560, 5763), (3842, 5340), (4520, 4539)]