21135128

素因数分解:

$2^3\times 7^1\times {\mathrm{53}}^1\times {\mathrm{7121}}^1$

素因数の和:7187

約数の個数: 32

約数和(自身を含む): 46150560

約数和(自身を除く): 25015432

約数列:

[1, 2, 4, 7, 8, 14, 28, 53, 56, 106, 212, 371, 424, 742, 1484, 2968, 7121, 14242, 28484, 49847, 56968, 99694, 199388, 377413, 398776, 754826, 1509652, 2641891, 3019304, 5283782, 10567564, 21135128]

約数ペア:

[(1, 21135128), (2, 10567564), (4, 5283782), (7, 3019304), (8, 2641891), (14, 1509652), (28, 754826), (53, 398776), (56, 377413), (106, 199388), (212, 99694), (371, 56968), (424, 49847), (742, 28484), (1484, 14242), (2968, 7121)]