21188505

素因数分解:

$3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{193}}^1\times {\mathrm{563}}^1$

素因数の和:777

約数の個数: 32

約数和(自身を含む): 36763776

約数和(自身を除く): 15575271

約数列:

[1, 3, 5, 13, 15, 39, 65, 193, 195, 563, 579, 965, 1689, 2509, 2815, 2895, 7319, 7527, 8445, 12545, 21957, 36595, 37635, 108659, 109785, 325977, 543295, 1412567, 1629885, 4237701, 7062835, 21188505]

約数ペア:

[(1, 21188505), (3, 7062835), (5, 4237701), (13, 1629885), (15, 1412567), (39, 543295), (65, 325977), (193, 109785), (195, 108659), (563, 37635), (579, 36595), (965, 21957), (1689, 12545), (2509, 8445), (2815, 7527), (2895, 7319)]