20989878

素因数分解:

$2^1\times 3^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{37}}^1\times {\mathrm{1039}}^1$

素因数の和:1101

約数の個数: 64

約数和(自身を含む): 53114880

約数和(自身を除く): 32125002

約数列:

[1, 2, 3, 6, 7, 13, 14, 21, 26, 37, 39, 42, 74, 78, 91, 111, 182, 222, 259, 273, 481, 518, 546, 777, 962, 1039, 1443, 1554, 2078, 2886, 3117, 3367, 6234, 6734, 7273, 10101, 13507, 14546, 20202, 21819, 27014, 38443, 40521, 43638, 76886, 81042, 94549, 115329, 189098, 230658, 269101, 283647, 499759, 538202, 567294, 807303, 999518, 1499277, 1614606, 2998554, 3498313, 6996626, 10494939, 20989878]

約数ペア:

[(1, 20989878), (2, 10494939), (3, 6996626), (6, 3498313), (7, 2998554), (13, 1614606), (14, 1499277), (21, 999518), (26, 807303), (37, 567294), (39, 538202), (42, 499759), (74, 283647), (78, 269101), (91, 230658), (111, 189098), (182, 115329), (222, 94549), (259, 81042), (273, 76886), (481, 43638), (518, 40521), (546, 38443), (777, 27014), (962, 21819), (1039, 20202), (1443, 14546), (1554, 13507), (2078, 10101), (2886, 7273), (3117, 6734), (3367, 6234)]