21398195

素因数分解:

$5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{131}}^1\times {\mathrm{359}}^1$

素因数の和:515

約数の個数: 32

約数和(自身を含む): 31933440

約数和(自身を除く): 10535245

約数列:

[1, 5, 7, 13, 35, 65, 91, 131, 359, 455, 655, 917, 1703, 1795, 2513, 4585, 4667, 8515, 11921, 12565, 23335, 32669, 47029, 59605, 163345, 235145, 329203, 611377, 1646015, 3056885, 4279639, 21398195]

約数ペア:

[(1, 21398195), (5, 4279639), (7, 3056885), (13, 1646015), (35, 611377), (65, 329203), (91, 235145), (131, 163345), (359, 59605), (455, 47029), (655, 32669), (917, 23335), (1703, 12565), (1795, 11921), (2513, 8515), (4585, 4667)]