65438681

素因数分解:

$7^1\times {\mathrm{11}}^1\times {\mathrm{37}}^1\times {\mathrm{103}}^1\times {\mathrm{223}}^1$

素因数の和:381

約数の個数: 32

約数和(自身を含む): 84983808

約数和(自身を除く): 19545127

約数列:

[1, 7, 11, 37, 77, 103, 223, 259, 407, 721, 1133, 1561, 2453, 2849, 3811, 7931, 8251, 17171, 22969, 26677, 41921, 57757, 90761, 160783, 252659, 293447, 635327, 849853, 1768613, 5948971, 9348383, 65438681]

約数ペア:

[(1, 65438681), (7, 9348383), (11, 5948971), (37, 1768613), (77, 849853), (103, 635327), (223, 293447), (259, 252659), (407, 160783), (721, 90761), (1133, 57757), (1561, 41921), (2453, 26677), (2849, 22969), (3811, 17171), (7931, 8251)]