21139580

素因数分解:

$2^2\times 5^1\times 7^2\times {\mathrm{11}}^1\times {\mathrm{37}}^1\times {\mathrm{53}}^1$

素因数の和:124

約数の個数: 144

約数和(自身を含む): 58949856

約数和(自身を除く): 37810276

約数列:

[1, 2, 4, 5, 7, 10, 11, 14, 20, 22, 28, 35, 37, 44, 49, 53, 55, 70, 74, 77, 98, 106, 110, 140, 148, 154, 185, 196, 212, 220, 245, 259, 265, 308, 370, 371, 385, 407, 490, 518, 530, 539, 583, 740, 742, 770, 814, 980, 1036, 1060, 1078, 1166, 1295, 1484, 1540, 1628, 1813, 1855, 1961, 2035, 2156, 2332, 2590, 2597, 2695, 2849, 2915, 3626, 3710, 3922, 4070, 4081, 5180, 5194, 5390, 5698, 5830, 7252, 7420, 7844, 8140, 8162, 9065, 9805, 10388, 10780, 11396, 11660, 12985, 13727, 14245, 16324, 18130, 19610, 19943, 20405, 21571, 25970, 27454, 28490, 28567, 36260, 39220, 39886, 40810, 43142, 51940, 54908, 56980, 57134, 68635, 79772, 81620, 86284, 96089, 99715, 107855, 114268, 137270, 142835, 150997, 192178, 199430, 215710, 274540, 285670, 301994, 384356, 398860, 431420, 480445, 571340, 603988, 754985, 960890, 1056979, 1509970, 1921780, 2113958, 3019940, 4227916, 5284895, 10569790, 21139580]

約数ペア:

[(1, 21139580), (2, 10569790), (4, 5284895), (5, 4227916), (7, 3019940), (10, 2113958), (11, 1921780), (14, 1509970), (20, 1056979), (22, 960890), (28, 754985), (35, 603988), (37, 571340), (44, 480445), (49, 431420), (53, 398860), (55, 384356), (70, 301994), (74, 285670), (77, 274540), (98, 215710), (106, 199430), (110, 192178), (140, 150997), (148, 142835), (154, 137270), (185, 114268), (196, 107855), (212, 99715), (220, 96089), (245, 86284), (259, 81620), (265, 79772), (308, 68635), (370, 57134), (371, 56980), (385, 54908), (407, 51940), (490, 43142), (518, 40810), (530, 39886), (539, 39220), (583, 36260), (740, 28567), (742, 28490), (770, 27454), (814, 25970), (980, 21571), (1036, 20405), (1060, 19943), (1078, 19610), (1166, 18130), (1295, 16324), (1484, 14245), (1540, 13727), (1628, 12985), (1813, 11660), (1855, 11396), (1961, 10780), (2035, 10388), (2156, 9805), (2332, 9065), (2590, 8162), (2597, 8140), (2695, 7844), (2849, 7420), (2915, 7252), (3626, 5830), (3710, 5698), (3922, 5390), (4070, 5194), (4081, 5180)]