20455280

素因数分解:

$2^4\times 5^1\times {\mathrm{23}}^1\times {\mathrm{11117}}^1$

素因数の和:11153

約数の個数: 40

約数和(自身を含む): 49630752

約数和(自身を除く): 29175472

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 23, 40, 46, 80, 92, 115, 184, 230, 368, 460, 920, 1840, 11117, 22234, 44468, 55585, 88936, 111170, 177872, 222340, 255691, 444680, 511382, 889360, 1022764, 1278455, 2045528, 2556910, 4091056, 5113820, 10227640, 20455280]

約数ペア:

[(1, 20455280), (2, 10227640), (4, 5113820), (5, 4091056), (8, 2556910), (10, 2045528), (16, 1278455), (20, 1022764), (23, 889360), (40, 511382), (46, 444680), (80, 255691), (92, 222340), (115, 177872), (184, 111170), (230, 88936), (368, 55585), (460, 44468), (920, 22234), (1840, 11117)]