20902401

素因数分解:

$3^3\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{31}}^1\times {\mathrm{113}}^1$

素因数の和:183

約数の個数: 64

約数和(自身を含む): 36771840

約数和(自身を除く): 15869439

約数列:

[1, 3, 9, 13, 17, 27, 31, 39, 51, 93, 113, 117, 153, 221, 279, 339, 351, 403, 459, 527, 663, 837, 1017, 1209, 1469, 1581, 1921, 1989, 3051, 3503, 3627, 4407, 4743, 5763, 5967, 6851, 10509, 10881, 13221, 14229, 17289, 20553, 24973, 31527, 39663, 45539, 51867, 59551, 61659, 74919, 94581, 136617, 178653, 184977, 224757, 409851, 535959, 674271, 774163, 1229553, 1607877, 2322489, 6967467, 20902401]

約数ペア:

[(1, 20902401), (3, 6967467), (9, 2322489), (13, 1607877), (17, 1229553), (27, 774163), (31, 674271), (39, 535959), (51, 409851), (93, 224757), (113, 184977), (117, 178653), (153, 136617), (221, 94581), (279, 74919), (339, 61659), (351, 59551), (403, 51867), (459, 45539), (527, 39663), (663, 31527), (837, 24973), (1017, 20553), (1209, 17289), (1469, 14229), (1581, 13221), (1921, 10881), (1989, 10509), (3051, 6851), (3503, 5967), (3627, 5763), (4407, 4743)]