19980818

素因数分解:

$2^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{3677}}^1$

素因数の和:3722

約数の個数: 32

約数和(自身を含む): 37074240

約数和(自身を除く): 17093422

約数列:

[1, 2, 11, 13, 19, 22, 26, 38, 143, 209, 247, 286, 418, 494, 2717, 3677, 5434, 7354, 40447, 47801, 69863, 80894, 95602, 139726, 525811, 768493, 908219, 1051622, 1536986, 1816438, 9990409, 19980818]

約数ペア:

[(1, 19980818), (2, 9990409), (11, 1816438), (13, 1536986), (19, 1051622), (22, 908219), (26, 768493), (38, 525811), (143, 139726), (209, 95602), (247, 80894), (286, 69863), (418, 47801), (494, 40447), (2717, 7354), (3677, 5434)]