21990147207

素因数分解:

$3^1\times 7^1\times {\mathrm{17}}^1\times {\mathrm{61597051}}^1$

素因数の和:61597078

約数の個数: 16

約数和(自身を含む): 35479901952

約数和(自身を除く): 13489754745

約数列:

[1, 3, 7, 17, 21, 51, 119, 357, 61597051, 184791153, 431179357, 1047149867, 1293538071, 3141449601, 7330049069, 21990147207]

約数ペア:

[(1, 21990147207), (3, 7330049069), (7, 3141449601), (17, 1293538071), (21, 1047149867), (51, 431179357), (119, 184791153), (357, 61597051)]