21126820

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{83}}^1\times {\mathrm{89}}^1$

素因数の和:205

約数の個数: 96

約数和(自身を含む): 53343360

約数和(自身を除く): 32216540

約数列:

[1, 2, 4, 5, 10, 11, 13, 20, 22, 26, 44, 52, 55, 65, 83, 89, 110, 130, 143, 166, 178, 220, 260, 286, 332, 356, 415, 445, 572, 715, 830, 890, 913, 979, 1079, 1157, 1430, 1660, 1780, 1826, 1958, 2158, 2314, 2860, 3652, 3916, 4316, 4565, 4628, 4895, 5395, 5785, 7387, 9130, 9790, 10790, 11570, 11869, 12727, 14774, 18260, 19580, 21580, 23140, 23738, 25454, 29548, 36935, 47476, 50908, 59345, 63635, 73870, 81257, 96031, 118690, 127270, 147740, 162514, 192062, 237380, 254540, 325028, 384124, 406285, 480155, 812570, 960310, 1056341, 1625140, 1920620, 2112682, 4225364, 5281705, 10563410, 21126820]

約数ペア:

[(1, 21126820), (2, 10563410), (4, 5281705), (5, 4225364), (10, 2112682), (11, 1920620), (13, 1625140), (20, 1056341), (22, 960310), (26, 812570), (44, 480155), (52, 406285), (55, 384124), (65, 325028), (83, 254540), (89, 237380), (110, 192062), (130, 162514), (143, 147740), (166, 127270), (178, 118690), (220, 96031), (260, 81257), (286, 73870), (332, 63635), (356, 59345), (415, 50908), (445, 47476), (572, 36935), (715, 29548), (830, 25454), (890, 23738), (913, 23140), (979, 21580), (1079, 19580), (1157, 18260), (1430, 14774), (1660, 12727), (1780, 11869), (1826, 11570), (1958, 10790), (2158, 9790), (2314, 9130), (2860, 7387), (3652, 5785), (3916, 5395), (4316, 4895), (4565, 4628)]