21039256

素因数分解:

$2^3\times 7^1\times {\mathrm{157}}^1\times {\mathrm{2393}}^1$

素因数の和:2563

約数の個数: 32

約数和(自身を含む): 45390240

約数和(自身を除く): 24350984

約数列:

[1, 2, 4, 7, 8, 14, 28, 56, 157, 314, 628, 1099, 1256, 2198, 2393, 4396, 4786, 8792, 9572, 16751, 19144, 33502, 67004, 134008, 375701, 751402, 1502804, 2629907, 3005608, 5259814, 10519628, 21039256]

約数ペア:

[(1, 21039256), (2, 10519628), (4, 5259814), (7, 3005608), (8, 2629907), (14, 1502804), (28, 751402), (56, 375701), (157, 134008), (314, 67004), (628, 33502), (1099, 19144), (1256, 16751), (2198, 9572), (2393, 8792), (4396, 4786)]