19940643

素因数分解:

$3^2\times {\mathrm{17}}^1\times {\mathrm{47}}^2\times {\mathrm{59}}^1$

素因数の和:176

約数の個数: 36

約数和(自身を含む): 31688280

約数和(自身を除く): 11747637

約数列:

[1, 3, 9, 17, 47, 51, 59, 141, 153, 177, 423, 531, 799, 1003, 2209, 2397, 2773, 3009, 6627, 7191, 8319, 9027, 19881, 24957, 37553, 47141, 112659, 130331, 141423, 337977, 390993, 424269, 1172979, 2215627, 6646881, 19940643]

約数ペア:

[(1, 19940643), (3, 6646881), (9, 2215627), (17, 1172979), (47, 424269), (51, 390993), (59, 337977), (141, 141423), (153, 130331), (177, 112659), (423, 47141), (531, 37553), (799, 24957), (1003, 19881), (2209, 9027), (2397, 8319), (2773, 7191), (3009, 6627)]