20279973

素因数分解:

$3^1\times 7^2\times {\mathrm{19}}^1\times {\mathrm{53}}^1\times {\mathrm{137}}^1$

素因数の和:226

約数の個数: 48

約数和(自身を含む): 33981120

約数和(自身を除く): 13701147

約数列:

[1, 3, 7, 19, 21, 49, 53, 57, 133, 137, 147, 159, 371, 399, 411, 931, 959, 1007, 1113, 2597, 2603, 2793, 2877, 3021, 6713, 7049, 7261, 7791, 7809, 18221, 20139, 21147, 21783, 49343, 50827, 54663, 127547, 137959, 148029, 152481, 355789, 382641, 413877, 965713, 1067367, 2897139, 6759991, 20279973]

約数ペア:

[(1, 20279973), (3, 6759991), (7, 2897139), (19, 1067367), (21, 965713), (49, 413877), (53, 382641), (57, 355789), (133, 152481), (137, 148029), (147, 137959), (159, 127547), (371, 54663), (399, 50827), (411, 49343), (931, 21783), (959, 21147), (1007, 20139), (1113, 18221), (2597, 7809), (2603, 7791), (2793, 7261), (2877, 7049), (3021, 6713)]