19973919

素因数分解:

$3^1\times 7^4\times {\mathrm{47}}^1\times {\mathrm{59}}^1$

素因数の和:137

約数の個数: 40

約数和(自身を含む): 32267520

約数和(自身を除く): 12293601

約数列:

[1, 3, 7, 21, 47, 49, 59, 141, 147, 177, 329, 343, 413, 987, 1029, 1239, 2303, 2401, 2773, 2891, 6909, 7203, 8319, 8673, 16121, 19411, 20237, 48363, 58233, 60711, 112847, 135877, 141659, 338541, 407631, 424977, 951139, 2853417, 6657973, 19973919]

約数ペア:

[(1, 19973919), (3, 6657973), (7, 2853417), (21, 951139), (47, 424977), (49, 407631), (59, 338541), (141, 141659), (147, 135877), (177, 112847), (329, 60711), (343, 58233), (413, 48363), (987, 20237), (1029, 19411), (1239, 16121), (2303, 8673), (2401, 8319), (2773, 7203), (2891, 6909)]