19978452

素因数分解:

$2^2\times 3^2\times {\mathrm{13}}^1\times {\mathrm{42689}}^1$

素因数の和:42712

約数の個数: 36

約数和(自身を含む): 54387060

約数和(自身を除く): 34408608

約数列:

[1, 2, 3, 4, 6, 9, 12, 13, 18, 26, 36, 39, 52, 78, 117, 156, 234, 468, 42689, 85378, 128067, 170756, 256134, 384201, 512268, 554957, 768402, 1109914, 1536804, 1664871, 2219828, 3329742, 4994613, 6659484, 9989226, 19978452]

約数ペア:

[(1, 19978452), (2, 9989226), (3, 6659484), (4, 4994613), (6, 3329742), (9, 2219828), (12, 1664871), (13, 1536804), (18, 1109914), (26, 768402), (36, 554957), (39, 512268), (52, 384201), (78, 256134), (117, 170756), (156, 128067), (234, 85378), (468, 42689)]