20720752

素因数分解:

$2^4\times {\mathrm{13}}^2\times {\mathrm{79}}^1\times {\mathrm{97}}^1$

素因数の和:210

約数の個数: 60

約数和(自身を含む): 44476320

約数和(自身を除く): 23755568

約数列:

[1, 2, 4, 8, 13, 16, 26, 52, 79, 97, 104, 158, 169, 194, 208, 316, 338, 388, 632, 676, 776, 1027, 1261, 1264, 1352, 1552, 2054, 2522, 2704, 4108, 5044, 7663, 8216, 10088, 13351, 15326, 16393, 16432, 20176, 26702, 30652, 32786, 53404, 61304, 65572, 99619, 106808, 122608, 131144, 199238, 213616, 262288, 398476, 796952, 1295047, 1593904, 2590094, 5180188, 10360376, 20720752]

約数ペア:

[(1, 20720752), (2, 10360376), (4, 5180188), (8, 2590094), (13, 1593904), (16, 1295047), (26, 796952), (52, 398476), (79, 262288), (97, 213616), (104, 199238), (158, 131144), (169, 122608), (194, 106808), (208, 99619), (316, 65572), (338, 61304), (388, 53404), (632, 32786), (676, 30652), (776, 26702), (1027, 20176), (1261, 16432), (1264, 16393), (1352, 15326), (1552, 13351), (2054, 10088), (2522, 8216), (2704, 7663), (4108, 5044)]