19919757

素因数分解:

$3^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{59}}^1\times {\mathrm{787}}^1$

素因数の和:873

約数の個数: 32

約数和(自身を含む): 31772160

約数和(自身を除く): 11852403

約数列:

[1, 3, 11, 13, 33, 39, 59, 143, 177, 429, 649, 767, 787, 1947, 2301, 2361, 8437, 8657, 10231, 25311, 25971, 30693, 46433, 112541, 139299, 337623, 510763, 603629, 1532289, 1810887, 6639919, 19919757]

約数ペア:

[(1, 19919757), (3, 6639919), (11, 1810887), (13, 1532289), (33, 603629), (39, 510763), (59, 337623), (143, 139299), (177, 112541), (429, 46433), (649, 30693), (767, 25971), (787, 25311), (1947, 10231), (2301, 8657), (2361, 8437)]