21405573

素因数分解:

$3^3\times 7^1\times {\mathrm{37}}^1\times {\mathrm{3061}}^1$

素因数の和:3114

約数の個数: 32

約数和(自身を含む): 37233920

約数和(自身を除く): 15828347

約数列:

[1, 3, 7, 9, 21, 27, 37, 63, 111, 189, 259, 333, 777, 999, 2331, 3061, 6993, 9183, 21427, 27549, 64281, 82647, 113257, 192843, 339771, 578529, 792799, 1019313, 2378397, 3057939, 7135191, 21405573]

約数ペア:

[(1, 21405573), (3, 7135191), (7, 3057939), (9, 2378397), (21, 1019313), (27, 792799), (37, 578529), (63, 339771), (111, 192843), (189, 113257), (259, 82647), (333, 64281), (777, 27549), (999, 21427), (2331, 9183), (3061, 6993)]