20917908

素因数分解:

$2^2\times 3^2\times {\mathrm{11}}^1\times {\mathrm{101}}^1\times {\mathrm{523}}^1$

素因数の和:645

約数の個数: 72

約数和(自身を含む): 58365216

約数和(自身を除く): 37447308

約数列:

[1, 2, 3, 4, 6, 9, 11, 12, 18, 22, 33, 36, 44, 66, 99, 101, 132, 198, 202, 303, 396, 404, 523, 606, 909, 1046, 1111, 1212, 1569, 1818, 2092, 2222, 3138, 3333, 3636, 4444, 4707, 5753, 6276, 6666, 9414, 9999, 11506, 13332, 17259, 18828, 19998, 23012, 34518, 39996, 51777, 52823, 69036, 103554, 105646, 158469, 207108, 211292, 316938, 475407, 581053, 633876, 950814, 1162106, 1743159, 1901628, 2324212, 3486318, 5229477, 6972636, 10458954, 20917908]

約数ペア:

[(1, 20917908), (2, 10458954), (3, 6972636), (4, 5229477), (6, 3486318), (9, 2324212), (11, 1901628), (12, 1743159), (18, 1162106), (22, 950814), (33, 633876), (36, 581053), (44, 475407), (66, 316938), (99, 211292), (101, 207108), (132, 158469), (198, 105646), (202, 103554), (303, 69036), (396, 52823), (404, 51777), (523, 39996), (606, 34518), (909, 23012), (1046, 19998), (1111, 18828), (1212, 17259), (1569, 13332), (1818, 11506), (2092, 9999), (2222, 9414), (3138, 6666), (3333, 6276), (3636, 5753), (4444, 4707)]