21257548

素因数分解:

$2^2\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{139}}^1\times {\mathrm{173}}^1$

素因数の和:346

約数の個数: 48

約数和(自身を含む): 42971040

約数和(自身を除く): 21713492

約数列:

[1, 2, 4, 13, 17, 26, 34, 52, 68, 139, 173, 221, 278, 346, 442, 556, 692, 884, 1807, 2249, 2363, 2941, 3614, 4498, 4726, 5882, 7228, 8996, 9452, 11764, 24047, 30719, 38233, 48094, 61438, 76466, 96188, 122876, 152932, 312611, 408799, 625222, 817598, 1250444, 1635196, 5314387, 10628774, 21257548]

約数ペア:

[(1, 21257548), (2, 10628774), (4, 5314387), (13, 1635196), (17, 1250444), (26, 817598), (34, 625222), (52, 408799), (68, 312611), (139, 152932), (173, 122876), (221, 96188), (278, 76466), (346, 61438), (442, 48094), (556, 38233), (692, 30719), (884, 24047), (1807, 11764), (2249, 9452), (2363, 8996), (2941, 7228), (3614, 5882), (4498, 4726)]