81483980

素因数分解:

$2^2\times 5^1\times {\mathrm{211}}^1\times {\mathrm{19309}}^1$

素因数の和:19529

約数の個数: 24

約数和(自身を含む): 171936240

約数和(自身を除く): 90452260

約数列:

[1, 2, 4, 5, 10, 20, 211, 422, 844, 1055, 2110, 4220, 19309, 38618, 77236, 96545, 193090, 386180, 4074199, 8148398, 16296796, 20370995, 40741990, 81483980]

約数ペア:

[(1, 81483980), (2, 40741990), (4, 20370995), (5, 16296796), (10, 8148398), (20, 4074199), (211, 386180), (422, 193090), (844, 96545), (1055, 77236), (2110, 38618), (4220, 19309)]