21105980

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{41}}^1\times {\mathrm{3677}}^1$

素因数の和:3734

約数の個数: 48

約数和(自身を含む): 51903936

約数和(自身を除く): 30797956

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 41, 70, 82, 140, 164, 205, 287, 410, 574, 820, 1148, 1435, 2870, 3677, 5740, 7354, 14708, 18385, 25739, 36770, 51478, 73540, 102956, 128695, 150757, 257390, 301514, 514780, 603028, 753785, 1055299, 1507570, 2110598, 3015140, 4221196, 5276495, 10552990, 21105980]

約数ペア:

[(1, 21105980), (2, 10552990), (4, 5276495), (5, 4221196), (7, 3015140), (10, 2110598), (14, 1507570), (20, 1055299), (28, 753785), (35, 603028), (41, 514780), (70, 301514), (82, 257390), (140, 150757), (164, 128695), (205, 102956), (287, 73540), (410, 51478), (574, 36770), (820, 25739), (1148, 18385), (1435, 14708), (2870, 7354), (3677, 5740)]