20506941

素因数分解:

$3^2\times 7^4\times {\mathrm{13}}^1\times {\mathrm{73}}^1$

素因数の和:120

約数の個数: 60

約数和(自身を含む): 37723868

約数和(自身を除く): 17216927

約数列:

[1, 3, 7, 9, 13, 21, 39, 49, 63, 73, 91, 117, 147, 219, 273, 343, 441, 511, 637, 657, 819, 949, 1029, 1533, 1911, 2401, 2847, 3087, 3577, 4459, 4599, 5733, 6643, 7203, 8541, 10731, 13377, 19929, 21609, 25039, 31213, 32193, 40131, 46501, 59787, 75117, 93639, 139503, 175273, 225351, 280917, 325507, 418509, 525819, 976521, 1577457, 2278549, 2929563, 6835647, 20506941]

約数ペア:

[(1, 20506941), (3, 6835647), (7, 2929563), (9, 2278549), (13, 1577457), (21, 976521), (39, 525819), (49, 418509), (63, 325507), (73, 280917), (91, 225351), (117, 175273), (147, 139503), (219, 93639), (273, 75117), (343, 59787), (441, 46501), (511, 40131), (637, 32193), (657, 31213), (819, 25039), (949, 21609), (1029, 19929), (1533, 13377), (1911, 10731), (2401, 8541), (2847, 7203), (3087, 6643), (3577, 5733), (4459, 4599)]