21308875

素因数分解:

$5^3\times 7^4\times {\mathrm{71}}^1$

素因数の和:114

約数の個数: 40

約数和(自身を含む): 31460832

約数和(自身を除く): 10151957

約数列:

[1, 5, 7, 25, 35, 49, 71, 125, 175, 245, 343, 355, 497, 875, 1225, 1715, 1775, 2401, 2485, 3479, 6125, 8575, 8875, 12005, 12425, 17395, 24353, 42875, 60025, 62125, 86975, 121765, 170471, 300125, 434875, 608825, 852355, 3044125, 4261775, 21308875]

約数ペア:

[(1, 21308875), (5, 4261775), (7, 3044125), (25, 852355), (35, 608825), (49, 434875), (71, 300125), (125, 170471), (175, 121765), (245, 86975), (343, 62125), (355, 60025), (497, 42875), (875, 24353), (1225, 17395), (1715, 12425), (1775, 12005), (2401, 8875), (2485, 8575), (3479, 6125)]