21179780

素因数分解:

$2^2\times 5^1\times {\mathrm{23}}^1\times {\mathrm{41}}^1\times {\mathrm{1123}}^1$

素因数の和:1196

約数の個数: 48

約数和(自身を含む): 47585664

約数和(自身を除く): 26405884

約数列:

[1, 2, 4, 5, 10, 20, 23, 41, 46, 82, 92, 115, 164, 205, 230, 410, 460, 820, 943, 1123, 1886, 2246, 3772, 4492, 4715, 5615, 9430, 11230, 18860, 22460, 25829, 46043, 51658, 92086, 103316, 129145, 184172, 230215, 258290, 460430, 516580, 920860, 1058989, 2117978, 4235956, 5294945, 10589890, 21179780]

約数ペア:

[(1, 21179780), (2, 10589890), (4, 5294945), (5, 4235956), (10, 2117978), (20, 1058989), (23, 920860), (41, 516580), (46, 460430), (82, 258290), (92, 230215), (115, 184172), (164, 129145), (205, 103316), (230, 92086), (410, 51658), (460, 46043), (820, 25829), (943, 22460), (1123, 18860), (1886, 11230), (2246, 9430), (3772, 5615), (4492, 4715)]