21053985

素因数分解:

$3^1\times 5^1\times {\mathrm{53}}^1\times {\mathrm{71}}^1\times {\mathrm{373}}^1$

素因数の和:505

約数の個数: 32

約数和(自身を含む): 34898688

約数和(自身を除く): 13844703

約数列:

[1, 3, 5, 15, 53, 71, 159, 213, 265, 355, 373, 795, 1065, 1119, 1865, 3763, 5595, 11289, 18815, 19769, 26483, 56445, 59307, 79449, 98845, 132415, 296535, 397245, 1403599, 4210797, 7017995, 21053985]

約数ペア:

[(1, 21053985), (3, 7017995), (5, 4210797), (15, 1403599), (53, 397245), (71, 296535), (159, 132415), (213, 98845), (265, 79449), (355, 59307), (373, 56445), (795, 26483), (1065, 19769), (1119, 18815), (1865, 11289), (3763, 5595)]