21353859

素因数分解:

$3^2\times {\mathrm{53}}^1\times {\mathrm{89}}^1\times {\mathrm{503}}^1$

素因数の和:651

約数の個数: 24

約数和(自身を含む): 31842720

約数和(自身を除く): 10488861

約数列:

[1, 3, 9, 53, 89, 159, 267, 477, 503, 801, 1509, 4527, 4717, 14151, 26659, 42453, 44767, 79977, 134301, 239931, 402903, 2372651, 7117953, 21353859]

約数ペア:

[(1, 21353859), (3, 7117953), (9, 2372651), (53, 402903), (89, 239931), (159, 134301), (267, 79977), (477, 44767), (503, 42453), (801, 26659), (1509, 14151), (4527, 4717)]