21317128

素因数分解:

$2^3\times 7^1\times {\mathrm{191}}^1\times {\mathrm{1993}}^1$

素因数の和:2197

約数の個数: 32

約数和(自身を含む): 45941760

約数和(自身を除く): 24624632

約数列:

[1, 2, 4, 7, 8, 14, 28, 56, 191, 382, 764, 1337, 1528, 1993, 2674, 3986, 5348, 7972, 10696, 13951, 15944, 27902, 55804, 111608, 380663, 761326, 1522652, 2664641, 3045304, 5329282, 10658564, 21317128]

約数ペア:

[(1, 21317128), (2, 10658564), (4, 5329282), (7, 3045304), (8, 2664641), (14, 1522652), (28, 761326), (56, 380663), (191, 111608), (382, 55804), (764, 27902), (1337, 15944), (1528, 13951), (1993, 10696), (2674, 7972), (3986, 5348)]