21961888

素因数分解:

$2^5\times {\mathrm{13}}^2\times {\mathrm{31}}^1\times {\mathrm{131}}^1$

素因数の和:198

約数の個数: 72

約数和(自身を含む): 48698496

約数和(自身を除く): 26736608

約数列:

[1, 2, 4, 8, 13, 16, 26, 31, 32, 52, 62, 104, 124, 131, 169, 208, 248, 262, 338, 403, 416, 496, 524, 676, 806, 992, 1048, 1352, 1612, 1703, 2096, 2704, 3224, 3406, 4061, 4192, 5239, 5408, 6448, 6812, 8122, 10478, 12896, 13624, 16244, 20956, 22139, 27248, 32488, 41912, 44278, 52793, 54496, 64976, 83824, 88556, 105586, 129952, 167648, 177112, 211172, 354224, 422344, 686309, 708448, 844688, 1372618, 1689376, 2745236, 5490472, 10980944, 21961888]

約数ペア:

[(1, 21961888), (2, 10980944), (4, 5490472), (8, 2745236), (13, 1689376), (16, 1372618), (26, 844688), (31, 708448), (32, 686309), (52, 422344), (62, 354224), (104, 211172), (124, 177112), (131, 167648), (169, 129952), (208, 105586), (248, 88556), (262, 83824), (338, 64976), (403, 54496), (416, 52793), (496, 44278), (524, 41912), (676, 32488), (806, 27248), (992, 22139), (1048, 20956), (1352, 16244), (1612, 13624), (1703, 12896), (2096, 10478), (2704, 8122), (3224, 6812), (3406, 6448), (4061, 5408), (4192, 5239)]