21577215

素因数分解:

$3^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{251}}^1\times {\mathrm{521}}^1$

素因数の和:791

約数の個数: 32

約数和(自身を含む): 37884672

約数和(自身を除く): 16307457

約数列:

[1, 3, 5, 11, 15, 33, 55, 165, 251, 521, 753, 1255, 1563, 2605, 2761, 3765, 5731, 7815, 8283, 13805, 17193, 28655, 41415, 85965, 130771, 392313, 653855, 1438481, 1961565, 4315443, 7192405, 21577215]

約数ペア:

[(1, 21577215), (3, 7192405), (5, 4315443), (11, 1961565), (15, 1438481), (33, 653855), (55, 392313), (165, 130771), (251, 85965), (521, 41415), (753, 28655), (1255, 17193), (1563, 13805), (2605, 8283), (2761, 7815), (3765, 5731)]