81527960

素因数分解:

$2^3\times 5^1\times {\mathrm{431}}^1\times {\mathrm{4729}}^1$

素因数の和:5171

約数の個数: 32

約数和(自身を含む): 183902400

約数和(自身を除く): 102374440

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 431, 862, 1724, 2155, 3448, 4310, 4729, 8620, 9458, 17240, 18916, 23645, 37832, 47290, 94580, 189160, 2038199, 4076398, 8152796, 10190995, 16305592, 20381990, 40763980, 81527960]

約数ペア:

[(1, 81527960), (2, 40763980), (4, 20381990), (5, 16305592), (8, 10190995), (10, 8152796), (20, 4076398), (40, 2038199), (431, 189160), (862, 94580), (1724, 47290), (2155, 37832), (3448, 23645), (4310, 18916), (4729, 17240), (8620, 9458)]