20980048

素因数分解:

$2^4\times {\mathrm{23}}^1\times {\mathrm{47}}^1\times {\mathrm{1213}}^1$

素因数の和:1291

約数の個数: 40

約数和(自身を含む): 43354368

約数和(自身を除く): 22374320

約数列:

[1, 2, 4, 8, 16, 23, 46, 47, 92, 94, 184, 188, 368, 376, 752, 1081, 1213, 2162, 2426, 4324, 4852, 8648, 9704, 17296, 19408, 27899, 55798, 57011, 111596, 114022, 223192, 228044, 446384, 456088, 912176, 1311253, 2622506, 5245012, 10490024, 20980048]

約数ペア:

[(1, 20980048), (2, 10490024), (4, 5245012), (8, 2622506), (16, 1311253), (23, 912176), (46, 456088), (47, 446384), (92, 228044), (94, 223192), (184, 114022), (188, 111596), (368, 57011), (376, 55798), (752, 27899), (1081, 19408), (1213, 17296), (2162, 9704), (2426, 8648), (4324, 4852)]