21512253

素因数分解:

$3^1\times 7^1\times {\mathrm{79}}^1\times {\mathrm{12967}}^1$

素因数の和:13056

約数の個数: 16

約数和(自身を含む): 33198080

約数和(自身を除く): 11685827

約数列:

[1, 3, 7, 21, 79, 237, 553, 1659, 12967, 38901, 90769, 272307, 1024393, 3073179, 7170751, 21512253]

約数ペア:

[(1, 21512253), (3, 7170751), (7, 3073179), (21, 1024393), (79, 272307), (237, 90769), (553, 38901), (1659, 12967)]