20320040

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{23}}^1\times {\mathrm{1699}}^1$

素因数の和:1746

約数の個数: 64

約数和(自身を含む): 51408000

約数和(自身を除く): 31087960

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 23, 26, 40, 46, 52, 65, 92, 104, 115, 130, 184, 230, 260, 299, 460, 520, 598, 920, 1196, 1495, 1699, 2392, 2990, 3398, 5980, 6796, 8495, 11960, 13592, 16990, 22087, 33980, 39077, 44174, 67960, 78154, 88348, 110435, 156308, 176696, 195385, 220870, 312616, 390770, 441740, 508001, 781540, 883480, 1016002, 1563080, 2032004, 2540005, 4064008, 5080010, 10160020, 20320040]

約数ペア:

[(1, 20320040), (2, 10160020), (4, 5080010), (5, 4064008), (8, 2540005), (10, 2032004), (13, 1563080), (20, 1016002), (23, 883480), (26, 781540), (40, 508001), (46, 441740), (52, 390770), (65, 312616), (92, 220870), (104, 195385), (115, 176696), (130, 156308), (184, 110435), (230, 88348), (260, 78154), (299, 67960), (460, 44174), (520, 39077), (598, 33980), (920, 22087), (1196, 16990), (1495, 13592), (1699, 11960), (2392, 8495), (2990, 6796), (3398, 5980)]