21986355

素因数分解:

$3^1\times 5^1\times {\mathrm{17}}^1\times {\mathrm{151}}^1\times {\mathrm{571}}^1$

素因数の和:747

約数の個数: 32

約数和(自身を含む): 37559808

約数和(自身を除く): 15573453

約数列:

[1, 3, 5, 15, 17, 51, 85, 151, 255, 453, 571, 755, 1713, 2265, 2567, 2855, 7701, 8565, 9707, 12835, 29121, 38505, 48535, 86221, 145605, 258663, 431105, 1293315, 1465757, 4397271, 7328785, 21986355]

約数ペア:

[(1, 21986355), (3, 7328785), (5, 4397271), (15, 1465757), (17, 1293315), (51, 431105), (85, 258663), (151, 145605), (255, 86221), (453, 48535), (571, 38505), (755, 29121), (1713, 12835), (2265, 9707), (2567, 8565), (2855, 7701)]