81528020

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{37}}^1\times {\mathrm{15739}}^1$

素因数の和:15792

約数の個数: 48

約数和(自身を含む): 200968320

約数和(自身を除く): 119440300

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 37, 70, 74, 140, 148, 185, 259, 370, 518, 740, 1036, 1295, 2590, 5180, 15739, 31478, 62956, 78695, 110173, 157390, 220346, 314780, 440692, 550865, 582343, 1101730, 1164686, 2203460, 2329372, 2911715, 4076401, 5823430, 8152802, 11646860, 16305604, 20382005, 40764010, 81528020]

約数ペア:

[(1, 81528020), (2, 40764010), (4, 20382005), (5, 16305604), (7, 11646860), (10, 8152802), (14, 5823430), (20, 4076401), (28, 2911715), (35, 2329372), (37, 2203460), (70, 1164686), (74, 1101730), (140, 582343), (148, 550865), (185, 440692), (259, 314780), (370, 220346), (518, 157390), (740, 110173), (1036, 78695), (1295, 62956), (2590, 31478), (5180, 15739)]