81464540

素因数分解:

$2^2\times 5^1\times {\mathrm{41}}^1\times {\mathrm{99347}}^1$

素因数の和:99397

約数の個数: 24

約数和(自身を含む): 175249872

約数和(自身を除く): 93785332

約数列:

[1, 2, 4, 5, 10, 20, 41, 82, 164, 205, 410, 820, 99347, 198694, 397388, 496735, 993470, 1986940, 4073227, 8146454, 16292908, 20366135, 40732270, 81464540]

約数ペア:

[(1, 81464540), (2, 40732270), (4, 20366135), (5, 16292908), (10, 8146454), (20, 4073227), (41, 1986940), (82, 993470), (164, 496735), (205, 397388), (410, 198694), (820, 99347)]