21215223

素因数分解:

$3^3\times {\mathrm{23}}^1\times {\mathrm{127}}^1\times {\mathrm{269}}^1$

素因数の和:428

約数の個数: 32

約数和(自身を含む): 33177600

約数和(自身を除く): 11962377

約数列:

[1, 3, 9, 23, 27, 69, 127, 207, 269, 381, 621, 807, 1143, 2421, 2921, 3429, 6187, 7263, 8763, 18561, 26289, 34163, 55683, 78867, 102489, 167049, 307467, 785749, 922401, 2357247, 7071741, 21215223]

約数ペア:

[(1, 21215223), (3, 7071741), (9, 2357247), (23, 922401), (27, 785749), (69, 307467), (127, 167049), (207, 102489), (269, 78867), (381, 55683), (621, 34163), (807, 26289), (1143, 18561), (2421, 8763), (2921, 7263), (3429, 6187)]