20028325

素因数分解:

$5^2\times {\mathrm{31}}^1\times {\mathrm{43}}^1\times {\mathrm{601}}^1$

素因数の和:685

約数の個数: 24

約数和(自身を含む): 26276096

約数和(自身を除く): 6247771

約数列:

[1, 5, 25, 31, 43, 155, 215, 601, 775, 1075, 1333, 3005, 6665, 15025, 18631, 25843, 33325, 93155, 129215, 465775, 646075, 801133, 4005665, 20028325]

約数ペア:

[(1, 20028325), (5, 4005665), (25, 801133), (31, 646075), (43, 465775), (155, 129215), (215, 93155), (601, 33325), (775, 25843), (1075, 18631), (1333, 15025), (3005, 6665)]