20400080

素因数分解:

$2^4\times 5^1\times {\mathrm{23}}^1\times {\mathrm{11087}}^1$

素因数の和:11123

約数の個数: 40

約数和(自身を含む): 49496832

約数和(自身を除く): 29096752

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 23, 40, 46, 80, 92, 115, 184, 230, 368, 460, 920, 1840, 11087, 22174, 44348, 55435, 88696, 110870, 177392, 221740, 255001, 443480, 510002, 886960, 1020004, 1275005, 2040008, 2550010, 4080016, 5100020, 10200040, 20400080]

約数ペア:

[(1, 20400080), (2, 10200040), (4, 5100020), (5, 4080016), (8, 2550010), (10, 2040008), (16, 1275005), (20, 1020004), (23, 886960), (40, 510002), (46, 443480), (80, 255001), (92, 221740), (115, 177392), (184, 110870), (230, 88696), (368, 55435), (460, 44348), (920, 22174), (1840, 11087)]