21340185

素因数分解:

$3^1\times 5^1\times {\mathrm{17}}^1\times {\mathrm{53}}^1\times {\mathrm{1579}}^1$

素因数の和:1657

約数の個数: 32

約数和(自身を含む): 36858240

約数和(自身を除く): 15518055

約数列:

[1, 3, 5, 15, 17, 51, 53, 85, 159, 255, 265, 795, 901, 1579, 2703, 4505, 4737, 7895, 13515, 23685, 26843, 80529, 83687, 134215, 251061, 402645, 418435, 1255305, 1422679, 4268037, 7113395, 21340185]

約数ペア:

[(1, 21340185), (3, 7113395), (5, 4268037), (15, 1422679), (17, 1255305), (51, 418435), (53, 402645), (85, 251061), (159, 134215), (255, 83687), (265, 80529), (795, 26843), (901, 23685), (1579, 13515), (2703, 7895), (4505, 4737)]