28680980

素因数分解:

$2^2\times 5^1\times {\mathrm{61}}^1\times {\mathrm{23509}}^1$

素因数の和:23579

約数の個数: 24

約数和(自身を含む): 61220040

約数和(自身を除く): 32539060

約数列:

[1, 2, 4, 5, 10, 20, 61, 122, 244, 305, 610, 1220, 23509, 47018, 94036, 117545, 235090, 470180, 1434049, 2868098, 5736196, 7170245, 14340490, 28680980]

約数ペア:

[(1, 28680980), (2, 14340490), (4, 7170245), (5, 5736196), (10, 2868098), (20, 1434049), (61, 470180), (122, 235090), (244, 117545), (305, 94036), (610, 47018), (1220, 23509)]