20391789

素因数分解:

$3^1\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{163}}^1\times {\mathrm{223}}^1$

素因数の和:417

約数の個数: 32

約数和(自身を含む): 31739904

約数和(自身を除く): 11348115

約数列:

[1, 3, 11, 17, 33, 51, 163, 187, 223, 489, 561, 669, 1793, 2453, 2771, 3791, 5379, 7359, 8313, 11373, 30481, 36349, 41701, 91443, 109047, 125103, 399839, 617933, 1199517, 1853799, 6797263, 20391789]

約数ペア:

[(1, 20391789), (3, 6797263), (11, 1853799), (17, 1199517), (33, 617933), (51, 399839), (163, 125103), (187, 109047), (223, 91443), (489, 41701), (561, 36349), (669, 30481), (1793, 11373), (2453, 8313), (2771, 7359), (3791, 5379)]