21479540

素因数分解:

$2^2\times 5^1\times {\mathrm{59}}^1\times {\mathrm{109}}^1\times {\mathrm{167}}^1$

素因数の和:344

約数の個数: 48

約数和(自身を含む): 46569600

約数和(自身を除く): 25090060

約数列:

[1, 2, 4, 5, 10, 20, 59, 109, 118, 167, 218, 236, 295, 334, 436, 545, 590, 668, 835, 1090, 1180, 1670, 2180, 3340, 6431, 9853, 12862, 18203, 19706, 25724, 32155, 36406, 39412, 49265, 64310, 72812, 91015, 98530, 128620, 182030, 197060, 364060, 1073977, 2147954, 4295908, 5369885, 10739770, 21479540]

約数ペア:

[(1, 21479540), (2, 10739770), (4, 5369885), (5, 4295908), (10, 2147954), (20, 1073977), (59, 364060), (109, 197060), (118, 182030), (167, 128620), (218, 98530), (236, 91015), (295, 72812), (334, 64310), (436, 49265), (545, 39412), (590, 36406), (668, 32155), (835, 25724), (1090, 19706), (1180, 18203), (1670, 12862), (2180, 9853), (3340, 6431)]