21988645

素因数分解:

$5^1\times 7^1\times {\mathrm{503}}^1\times {\mathrm{1249}}^1$

素因数の和:1764

約数の個数: 16

約数和(自身を含む): 30240000

約数和(自身を除く): 8251355

約数列:

[1, 5, 7, 35, 503, 1249, 2515, 3521, 6245, 8743, 17605, 43715, 628247, 3141235, 4397729, 21988645]

約数ペア:

[(1, 21988645), (5, 4397729), (7, 3141235), (35, 628247), (503, 43715), (1249, 17605), (2515, 8743), (3521, 6245)]