20485264

素因数分解:

$2^4\times {\mathrm{61}}^1\times {\mathrm{139}}^1\times {\mathrm{151}}^1$

素因数の和:359

約数の個数: 40

約数和(自身を含む): 40900160

約数和(自身を除く): 20414896

約数列:

[1, 2, 4, 8, 16, 61, 122, 139, 151, 244, 278, 302, 488, 556, 604, 976, 1112, 1208, 2224, 2416, 8479, 9211, 16958, 18422, 20989, 33916, 36844, 41978, 67832, 73688, 83956, 135664, 147376, 167912, 335824, 1280329, 2560658, 5121316, 10242632, 20485264]

約数ペア:

[(1, 20485264), (2, 10242632), (4, 5121316), (8, 2560658), (16, 1280329), (61, 335824), (122, 167912), (139, 147376), (151, 135664), (244, 83956), (278, 73688), (302, 67832), (488, 41978), (556, 36844), (604, 33916), (976, 20989), (1112, 18422), (1208, 16958), (2224, 9211), (2416, 8479)]