21270753

素因数分解:

$3^2\times 7^2\times {\mathrm{139}}^1\times {\mathrm{347}}^1$

素因数の和:506

約数の個数: 36

約数和(自身を含む): 36101520

約数和(自身を除く): 14830767

約数列:

[1, 3, 7, 9, 21, 49, 63, 139, 147, 347, 417, 441, 973, 1041, 1251, 2429, 2919, 3123, 6811, 7287, 8757, 17003, 20433, 21861, 48233, 51009, 61299, 144699, 153027, 337631, 434097, 1012893, 2363417, 3038679, 7090251, 21270753]

約数ペア:

[(1, 21270753), (3, 7090251), (7, 3038679), (9, 2363417), (21, 1012893), (49, 434097), (63, 337631), (139, 153027), (147, 144699), (347, 61299), (417, 51009), (441, 48233), (973, 21861), (1041, 20433), (1251, 17003), (2429, 8757), (2919, 7287), (3123, 6811)]