20016801

素因数分解:

$3^4\times 7^1\times {\mathrm{43}}^1\times {\mathrm{821}}^1$

素因数の和:883

約数の個数: 40

約数和(自身を含む): 35010624

約数和(自身を除く): 14993823

約数列:

[1, 3, 7, 9, 21, 27, 43, 63, 81, 129, 189, 301, 387, 567, 821, 903, 1161, 2463, 2709, 3483, 5747, 7389, 8127, 17241, 22167, 24381, 35303, 51723, 66501, 105909, 155169, 247121, 317727, 465507, 741363, 953181, 2224089, 2859543, 6672267, 20016801]

約数ペア:

[(1, 20016801), (3, 6672267), (7, 2859543), (9, 2224089), (21, 953181), (27, 741363), (43, 465507), (63, 317727), (81, 247121), (129, 155169), (189, 105909), (301, 66501), (387, 51723), (567, 35303), (821, 24381), (903, 22167), (1161, 17241), (2463, 8127), (2709, 7389), (3483, 5747)]