19716081

素因数分解:

$3^1\times 7^2\times {\mathrm{11}}^1\times {\mathrm{89}}^1\times {\mathrm{137}}^1$

素因数の和:254

約数の個数: 48

約数和(自身を含む): 33981120

約数和(自身を除く): 14265039

約数列:

[1, 3, 7, 11, 21, 33, 49, 77, 89, 137, 147, 231, 267, 411, 539, 623, 959, 979, 1507, 1617, 1869, 2877, 2937, 4361, 4521, 6713, 6853, 10549, 12193, 13083, 20139, 20559, 31647, 36579, 47971, 73843, 85351, 134123, 143913, 221529, 256053, 402369, 597457, 938861, 1792371, 2816583, 6572027, 19716081]

約数ペア:

[(1, 19716081), (3, 6572027), (7, 2816583), (11, 1792371), (21, 938861), (33, 597457), (49, 402369), (77, 256053), (89, 221529), (137, 143913), (147, 134123), (231, 85351), (267, 73843), (411, 47971), (539, 36579), (623, 31647), (959, 20559), (979, 20139), (1507, 13083), (1617, 12193), (1869, 10549), (2877, 6853), (2937, 6713), (4361, 4521)]