20953900

素因数分解:

$2^2\times 5^2\times {\mathrm{11}}^1\times {\mathrm{43}}^1\times {\mathrm{443}}^1$

素因数の和:511

約数の個数: 72

約数和(自身を含む): 50871744

約数和(自身を除く): 29917844

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 25, 43, 44, 50, 55, 86, 100, 110, 172, 215, 220, 275, 430, 443, 473, 550, 860, 886, 946, 1075, 1100, 1772, 1892, 2150, 2215, 2365, 4300, 4430, 4730, 4873, 8860, 9460, 9746, 11075, 11825, 19049, 19492, 22150, 23650, 24365, 38098, 44300, 47300, 48730, 76196, 95245, 97460, 121825, 190490, 209539, 243650, 380980, 419078, 476225, 487300, 838156, 952450, 1047695, 1904900, 2095390, 4190780, 5238475, 10476950, 20953900]

約数ペア:

[(1, 20953900), (2, 10476950), (4, 5238475), (5, 4190780), (10, 2095390), (11, 1904900), (20, 1047695), (22, 952450), (25, 838156), (43, 487300), (44, 476225), (50, 419078), (55, 380980), (86, 243650), (100, 209539), (110, 190490), (172, 121825), (215, 97460), (220, 95245), (275, 76196), (430, 48730), (443, 47300), (473, 44300), (550, 38098), (860, 24365), (886, 23650), (946, 22150), (1075, 19492), (1100, 19049), (1772, 11825), (1892, 11075), (2150, 9746), (2215, 9460), (2365, 8860), (4300, 4873), (4430, 4730)]