20993776

素因数分解:

$2^4\times {\mathrm{17}}^1\times {\mathrm{79}}^1\times {\mathrm{977}}^1$

素因数の和:1081

約数の個数: 40

約数和(自身を含む): 43657920

約数和(自身を除く): 22664144

約数列:

[1, 2, 4, 8, 16, 17, 34, 68, 79, 136, 158, 272, 316, 632, 977, 1264, 1343, 1954, 2686, 3908, 5372, 7816, 10744, 15632, 16609, 21488, 33218, 66436, 77183, 132872, 154366, 265744, 308732, 617464, 1234928, 1312111, 2624222, 5248444, 10496888, 20993776]

約数ペア:

[(1, 20993776), (2, 10496888), (4, 5248444), (8, 2624222), (16, 1312111), (17, 1234928), (34, 617464), (68, 308732), (79, 265744), (136, 154366), (158, 132872), (272, 77183), (316, 66436), (632, 33218), (977, 21488), (1264, 16609), (1343, 15632), (1954, 10744), (2686, 7816), (3908, 5372)]