20970873

素因数分解:

$3^3\times 7^2\times {\mathrm{11}}^2\times {\mathrm{131}}^1$

素因数の和:176

約数の個数: 72

約数和(自身を含む): 40027680

約数和(自身を除く): 19056807

約数列:

[1, 3, 7, 9, 11, 21, 27, 33, 49, 63, 77, 99, 121, 131, 147, 189, 231, 297, 363, 393, 441, 539, 693, 847, 917, 1089, 1179, 1323, 1441, 1617, 2079, 2541, 2751, 3267, 3537, 4323, 4851, 5929, 6419, 7623, 8253, 10087, 12969, 14553, 15851, 17787, 19257, 22869, 24759, 30261, 38907, 47553, 53361, 57771, 70609, 90783, 110957, 142659, 160083, 173313, 211827, 272349, 332871, 427977, 635481, 776699, 998613, 1906443, 2330097, 2995839, 6990291, 20970873]

約数ペア:

[(1, 20970873), (3, 6990291), (7, 2995839), (9, 2330097), (11, 1906443), (21, 998613), (27, 776699), (33, 635481), (49, 427977), (63, 332871), (77, 272349), (99, 211827), (121, 173313), (131, 160083), (147, 142659), (189, 110957), (231, 90783), (297, 70609), (363, 57771), (393, 53361), (441, 47553), (539, 38907), (693, 30261), (847, 24759), (917, 22869), (1089, 19257), (1179, 17787), (1323, 15851), (1441, 14553), (1617, 12969), (2079, 10087), (2541, 8253), (2751, 7623), (3267, 6419), (3537, 5929), (4323, 4851)]