19975977

素因数分解:

$3^4\times 7^3\times {\mathrm{719}}^1$

素因数の和:752

約数の個数: 40

約数和(自身を含む): 34848000

約数和(自身を除く): 14872023

約数列:

[1, 3, 7, 9, 21, 27, 49, 63, 81, 147, 189, 343, 441, 567, 719, 1029, 1323, 2157, 3087, 3969, 5033, 6471, 9261, 15099, 19413, 27783, 35231, 45297, 58239, 105693, 135891, 246617, 317079, 407673, 739851, 951237, 2219553, 2853711, 6658659, 19975977]

約数ペア:

[(1, 19975977), (3, 6658659), (7, 2853711), (9, 2219553), (21, 951237), (27, 739851), (49, 407673), (63, 317079), (81, 246617), (147, 135891), (189, 105693), (343, 58239), (441, 45297), (567, 35231), (719, 27783), (1029, 19413), (1323, 15099), (2157, 9261), (3087, 6471), (3969, 5033)]