21909345

素因数分解:

$3^1\times 5^1\times {\mathrm{17}}^1\times {\mathrm{151}}^1\times {\mathrm{569}}^1$

素因数の和:745

約数の個数: 32

約数和(自身を含む): 37428480

約数和(自身を除く): 15519135

約数列:

[1, 3, 5, 15, 17, 51, 85, 151, 255, 453, 569, 755, 1707, 2265, 2567, 2845, 7701, 8535, 9673, 12835, 29019, 38505, 48365, 85919, 145095, 257757, 429595, 1288785, 1460623, 4381869, 7303115, 21909345]

約数ペア:

[(1, 21909345), (3, 7303115), (5, 4381869), (15, 1460623), (17, 1288785), (51, 429595), (85, 257757), (151, 145095), (255, 85919), (453, 48365), (569, 38505), (755, 29019), (1707, 12835), (2265, 9673), (2567, 8535), (2845, 7701)]