20778675

素因数分解:

$3^1\times 5^2\times {\mathrm{17}}^1\times {\mathrm{43}}^1\times {\mathrm{379}}^1$

素因数の和:452

約数の個数: 48

約数和(自身を含む): 37319040

約数和(自身を除く): 16540365

約数列:

[1, 3, 5, 15, 17, 25, 43, 51, 75, 85, 129, 215, 255, 379, 425, 645, 731, 1075, 1137, 1275, 1895, 2193, 3225, 3655, 5685, 6443, 9475, 10965, 16297, 18275, 19329, 28425, 32215, 48891, 54825, 81485, 96645, 161075, 244455, 277049, 407425, 483225, 831147, 1222275, 1385245, 4155735, 6926225, 20778675]

約数ペア:

[(1, 20778675), (3, 6926225), (5, 4155735), (15, 1385245), (17, 1222275), (25, 831147), (43, 483225), (51, 407425), (75, 277049), (85, 244455), (129, 161075), (215, 96645), (255, 81485), (379, 54825), (425, 48891), (645, 32215), (731, 28425), (1075, 19329), (1137, 18275), (1275, 16297), (1895, 10965), (2193, 9475), (3225, 6443), (3655, 5685)]