20724440

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{37}}^1\times {\mathrm{67}}^1$

素因数の和:145

約数の個数: 128

約数和(自身を含む): 55814400

約数和(自身を除く): 35089960

約数列:

[1, 2, 4, 5, 8, 10, 11, 19, 20, 22, 37, 38, 40, 44, 55, 67, 74, 76, 88, 95, 110, 134, 148, 152, 185, 190, 209, 220, 268, 296, 335, 370, 380, 407, 418, 440, 536, 670, 703, 737, 740, 760, 814, 836, 1045, 1273, 1340, 1406, 1474, 1480, 1628, 1672, 2035, 2090, 2479, 2546, 2680, 2812, 2948, 3256, 3515, 3685, 4070, 4180, 4958, 5092, 5624, 5896, 6365, 7030, 7370, 7733, 8140, 8360, 9916, 10184, 12395, 12730, 14003, 14060, 14740, 15466, 16280, 19832, 24790, 25460, 27269, 28006, 28120, 29480, 30932, 38665, 47101, 49580, 50920, 54538, 56012, 61864, 70015, 77330, 94202, 99160, 109076, 112024, 136345, 140030, 154660, 188404, 218152, 235505, 272690, 280060, 309320, 376808, 471010, 518111, 545380, 560120, 942020, 1036222, 1090760, 1884040, 2072444, 2590555, 4144888, 5181110, 10362220, 20724440]

約数ペア:

[(1, 20724440), (2, 10362220), (4, 5181110), (5, 4144888), (8, 2590555), (10, 2072444), (11, 1884040), (19, 1090760), (20, 1036222), (22, 942020), (37, 560120), (38, 545380), (40, 518111), (44, 471010), (55, 376808), (67, 309320), (74, 280060), (76, 272690), (88, 235505), (95, 218152), (110, 188404), (134, 154660), (148, 140030), (152, 136345), (185, 112024), (190, 109076), (209, 99160), (220, 94202), (268, 77330), (296, 70015), (335, 61864), (370, 56012), (380, 54538), (407, 50920), (418, 49580), (440, 47101), (536, 38665), (670, 30932), (703, 29480), (737, 28120), (740, 28006), (760, 27269), (814, 25460), (836, 24790), (1045, 19832), (1273, 16280), (1340, 15466), (1406, 14740), (1474, 14060), (1480, 14003), (1628, 12730), (1672, 12395), (2035, 10184), (2090, 9916), (2479, 8360), (2546, 8140), (2680, 7733), (2812, 7370), (2948, 7030), (3256, 6365), (3515, 5896), (3685, 5624), (4070, 5092), (4180, 4958)]