21144207

素因数分解:

$3^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{197}}^1\times {\mathrm{269}}^1$

素因数の和:495

約数の個数: 32

約数和(自身を含む): 34214400

約数和(自身を除く): 13070193

約数列:

[1, 3, 7, 19, 21, 57, 133, 197, 269, 399, 591, 807, 1379, 1883, 3743, 4137, 5111, 5649, 11229, 15333, 26201, 35777, 52993, 78603, 107331, 158979, 370951, 1006867, 1112853, 3020601, 7048069, 21144207]

約数ペア:

[(1, 21144207), (3, 7048069), (7, 3020601), (19, 1112853), (21, 1006867), (57, 370951), (133, 158979), (197, 107331), (269, 78603), (399, 52993), (591, 35777), (807, 26201), (1379, 15333), (1883, 11229), (3743, 5649), (4137, 5111)]