21201831

素因数分解:

$3^4\times 7^1\times {\mathrm{61}}^1\times {\mathrm{613}}^1$

素因数の和:693

約数の個数: 40

約数和(自身を含む): 36849824

約数和(自身を除く): 15647993

約数列:

[1, 3, 7, 9, 21, 27, 61, 63, 81, 183, 189, 427, 549, 567, 613, 1281, 1647, 1839, 3843, 4291, 4941, 5517, 11529, 12873, 16551, 34587, 37393, 38619, 49653, 112179, 115857, 261751, 336537, 347571, 785253, 1009611, 2355759, 3028833, 7067277, 21201831]

約数ペア:

[(1, 21201831), (3, 7067277), (7, 3028833), (9, 2355759), (21, 1009611), (27, 785253), (61, 347571), (63, 336537), (81, 261751), (183, 115857), (189, 112179), (427, 49653), (549, 38619), (567, 37393), (613, 34587), (1281, 16551), (1647, 12873), (1839, 11529), (3843, 5517), (4291, 4941)]