21241563

素因数分解:

$3^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{139}}^1\times {\mathrm{383}}^1$

素因数の和:551

約数の個数: 32

約数和(自身を含む): 34406400

約数和(自身を除く): 13164837

約数列:

[1, 3, 7, 19, 21, 57, 133, 139, 383, 399, 417, 973, 1149, 2641, 2681, 2919, 7277, 7923, 8043, 18487, 21831, 50939, 53237, 55461, 152817, 159711, 372659, 1011503, 1117977, 3034509, 7080521, 21241563]

約数ペア:

[(1, 21241563), (3, 7080521), (7, 3034509), (19, 1117977), (21, 1011503), (57, 372659), (133, 159711), (139, 152817), (383, 55461), (399, 53237), (417, 50939), (973, 21831), (1149, 18487), (2641, 8043), (2681, 7923), (2919, 7277)]