21061700

素因数分解:

$2^2\times 5^2\times {\mathrm{11}}^1\times {\mathrm{41}}^1\times {\mathrm{467}}^1$

素因数の和:533

約数の個数: 72

約数和(自身を含む): 51184224

約数和(自身を除く): 30122524

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 25, 41, 44, 50, 55, 82, 100, 110, 164, 205, 220, 275, 410, 451, 467, 550, 820, 902, 934, 1025, 1100, 1804, 1868, 2050, 2255, 2335, 4100, 4510, 4670, 5137, 9020, 9340, 10274, 11275, 11675, 19147, 20548, 22550, 23350, 25685, 38294, 45100, 46700, 51370, 76588, 95735, 102740, 128425, 191470, 210617, 256850, 382940, 421234, 478675, 513700, 842468, 957350, 1053085, 1914700, 2106170, 4212340, 5265425, 10530850, 21061700]

約数ペア:

[(1, 21061700), (2, 10530850), (4, 5265425), (5, 4212340), (10, 2106170), (11, 1914700), (20, 1053085), (22, 957350), (25, 842468), (41, 513700), (44, 478675), (50, 421234), (55, 382940), (82, 256850), (100, 210617), (110, 191470), (164, 128425), (205, 102740), (220, 95735), (275, 76588), (410, 51370), (451, 46700), (467, 45100), (550, 38294), (820, 25685), (902, 23350), (934, 22550), (1025, 20548), (1100, 19147), (1804, 11675), (1868, 11275), (2050, 10274), (2255, 9340), (2335, 9020), (4100, 5137), (4510, 4670)]