20491900

素因数分解:

$2^2\times 5^2\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{1433}}^1$

素因数の和:1471

約数の個数: 72

約数和(自身を含む): 52277904

約数和(自身を除く): 31786004

約数列:

[1, 2, 4, 5, 10, 11, 13, 20, 22, 25, 26, 44, 50, 52, 55, 65, 100, 110, 130, 143, 220, 260, 275, 286, 325, 550, 572, 650, 715, 1100, 1300, 1430, 1433, 2860, 2866, 3575, 5732, 7150, 7165, 14300, 14330, 15763, 18629, 28660, 31526, 35825, 37258, 63052, 71650, 74516, 78815, 93145, 143300, 157630, 186290, 204919, 315260, 372580, 394075, 409838, 465725, 788150, 819676, 931450, 1024595, 1576300, 1862900, 2049190, 4098380, 5122975, 10245950, 20491900]

約数ペア:

[(1, 20491900), (2, 10245950), (4, 5122975), (5, 4098380), (10, 2049190), (11, 1862900), (13, 1576300), (20, 1024595), (22, 931450), (25, 819676), (26, 788150), (44, 465725), (50, 409838), (52, 394075), (55, 372580), (65, 315260), (100, 204919), (110, 186290), (130, 157630), (143, 143300), (220, 93145), (260, 78815), (275, 74516), (286, 71650), (325, 63052), (550, 37258), (572, 35825), (650, 31526), (715, 28660), (1100, 18629), (1300, 15763), (1430, 14330), (1433, 14300), (2860, 7165), (2866, 7150), (3575, 5732)]