20990502

素因数分解:

$2^1\times 3^4\times {\mathrm{13}}^1\times {\mathrm{9967}}^1$

素因数の和:9994

約数の個数: 40

約数和(自身を含む): 50657376

約数和(自身を除く): 29666874

約数列:

[1, 2, 3, 6, 9, 13, 18, 26, 27, 39, 54, 78, 81, 117, 162, 234, 351, 702, 1053, 2106, 9967, 19934, 29901, 59802, 89703, 129571, 179406, 259142, 269109, 388713, 538218, 777426, 807327, 1166139, 1614654, 2332278, 3498417, 6996834, 10495251, 20990502]

約数ペア:

[(1, 20990502), (2, 10495251), (3, 6996834), (6, 3498417), (9, 2332278), (13, 1614654), (18, 1166139), (26, 807327), (27, 777426), (39, 538218), (54, 388713), (78, 269109), (81, 259142), (117, 179406), (162, 129571), (234, 89703), (351, 59802), (702, 29901), (1053, 19934), (2106, 9967)]