21760915

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{31}}^1\times {\mathrm{12763}}^1$

素因数の和:12810

約数の個数: 16

約数和(自身を含む): 29408256

約数和(自身を除く): 7647341

約数列:

[1, 5, 11, 31, 55, 155, 341, 1705, 12763, 63815, 140393, 395653, 701965, 1978265, 4352183, 21760915]

約数ペア:

[(1, 21760915), (5, 4352183), (11, 1978265), (31, 701965), (55, 395653), (155, 140393), (341, 63815), (1705, 12763)]