21172795

素因数分解:

$5^1\times 7^1\times {\mathrm{47}}^1\times {\mathrm{61}}^1\times {\mathrm{211}}^1$

素因数の和:331

約数の個数: 32

約数和(自身を含む): 30283776

約数和(自身を除く): 9110981

約数列:

[1, 5, 7, 35, 47, 61, 211, 235, 305, 329, 427, 1055, 1477, 1645, 2135, 2867, 7385, 9917, 12871, 14335, 20069, 49585, 64355, 69419, 90097, 100345, 347095, 450485, 604937, 3024685, 4234559, 21172795]

約数ペア:

[(1, 21172795), (5, 4234559), (7, 3024685), (35, 604937), (47, 450485), (61, 347095), (211, 100345), (235, 90097), (305, 69419), (329, 64355), (427, 49585), (1055, 20069), (1477, 14335), (1645, 12871), (2135, 9917), (2867, 7385)]