21664818

素因数分解:

$2^1\times 3^2\times 7^1\times {\mathrm{139}}^1\times {\mathrm{1237}}^1$

素因数の和:1391

約数の個数: 48

約数和(自身を含む): 54075840

約数和(自身を除く): 32411022

約数列:

[1, 2, 3, 6, 7, 9, 14, 18, 21, 42, 63, 126, 139, 278, 417, 834, 973, 1237, 1251, 1946, 2474, 2502, 2919, 3711, 5838, 7422, 8659, 8757, 11133, 17318, 17514, 22266, 25977, 51954, 77931, 155862, 171943, 343886, 515829, 1031658, 1203601, 1547487, 2407202, 3094974, 3610803, 7221606, 10832409, 21664818]

約数ペア:

[(1, 21664818), (2, 10832409), (3, 7221606), (6, 3610803), (7, 3094974), (9, 2407202), (14, 1547487), (18, 1203601), (21, 1031658), (42, 515829), (63, 343886), (126, 171943), (139, 155862), (278, 77931), (417, 51954), (834, 25977), (973, 22266), (1237, 17514), (1251, 17318), (1946, 11133), (2474, 8757), (2502, 8659), (2919, 7422), (3711, 5838)]