256883120

素因数分解:

$2^4\times 5^1\times {\mathrm{13}}^1\times {\mathrm{139}}^1\times {\mathrm{1777}}^1$

素因数の和:1942

約数の個数: 80

約数和(自身を含む): 648187680

約数和(自身を除く): 391304560

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 40, 52, 65, 80, 104, 130, 139, 208, 260, 278, 520, 556, 695, 1040, 1112, 1390, 1777, 1807, 2224, 2780, 3554, 3614, 5560, 7108, 7228, 8885, 9035, 11120, 14216, 14456, 17770, 18070, 23101, 28432, 28912, 35540, 36140, 46202, 71080, 72280, 92404, 115505, 142160, 144560, 184808, 231010, 247003, 369616, 462020, 494006, 924040, 988012, 1235015, 1848080, 1976024, 2470030, 3211039, 3952048, 4940060, 6422078, 9880120, 12844156, 16055195, 19760240, 25688312, 32110390, 51376624, 64220780, 128441560, 256883120]

約数ペア:

[(1, 256883120), (2, 128441560), (4, 64220780), (5, 51376624), (8, 32110390), (10, 25688312), (13, 19760240), (16, 16055195), (20, 12844156), (26, 9880120), (40, 6422078), (52, 4940060), (65, 3952048), (80, 3211039), (104, 2470030), (130, 1976024), (139, 1848080), (208, 1235015), (260, 988012), (278, 924040), (520, 494006), (556, 462020), (695, 369616), (1040, 247003), (1112, 231010), (1390, 184808), (1777, 144560), (1807, 142160), (2224, 115505), (2780, 92404), (3554, 72280), (3614, 71080), (5560, 46202), (7108, 36140), (7228, 35540), (8885, 28912), (9035, 28432), (11120, 23101), (14216, 18070), (14456, 17770)]