21021220

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{47}}^1\times {\mathrm{107}}^1$

素因数の和:193

約数の個数: 96

約数和(自身を含む): 52254720

約数和(自身を除く): 31233500

約数列:

[1, 2, 4, 5, 10, 11, 19, 20, 22, 38, 44, 47, 55, 76, 94, 95, 107, 110, 188, 190, 209, 214, 220, 235, 380, 418, 428, 470, 517, 535, 836, 893, 940, 1034, 1045, 1070, 1177, 1786, 2033, 2068, 2090, 2140, 2354, 2585, 3572, 4066, 4180, 4465, 4708, 5029, 5170, 5885, 8132, 8930, 9823, 10058, 10165, 10340, 11770, 17860, 19646, 20116, 20330, 22363, 23540, 25145, 39292, 40660, 44726, 49115, 50290, 55319, 89452, 95551, 98230, 100580, 110638, 111815, 191102, 196460, 221276, 223630, 276595, 382204, 447260, 477755, 553190, 955510, 1051061, 1106380, 1911020, 2102122, 4204244, 5255305, 10510610, 21021220]

約数ペア:

[(1, 21021220), (2, 10510610), (4, 5255305), (5, 4204244), (10, 2102122), (11, 1911020), (19, 1106380), (20, 1051061), (22, 955510), (38, 553190), (44, 477755), (47, 447260), (55, 382204), (76, 276595), (94, 223630), (95, 221276), (107, 196460), (110, 191102), (188, 111815), (190, 110638), (209, 100580), (214, 98230), (220, 95551), (235, 89452), (380, 55319), (418, 50290), (428, 49115), (470, 44726), (517, 40660), (535, 39292), (836, 25145), (893, 23540), (940, 22363), (1034, 20330), (1045, 20116), (1070, 19646), (1177, 17860), (1786, 11770), (2033, 10340), (2068, 10165), (2090, 10058), (2140, 9823), (2354, 8930), (2585, 8132), (3572, 5885), (4066, 5170), (4180, 5029), (4465, 4708)]