21445120

素因数分解:

$2^9\times 5^1\times {\mathrm{8377}}^1$

素因数の和:8400

約数の個数: 40

約数和(自身を含む): 51424164

約数和(自身を除く): 29979044

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 160, 256, 320, 512, 640, 1280, 2560, 8377, 16754, 33508, 41885, 67016, 83770, 134032, 167540, 268064, 335080, 536128, 670160, 1072256, 1340320, 2144512, 2680640, 4289024, 5361280, 10722560, 21445120]

約数ペア:

[(1, 21445120), (2, 10722560), (4, 5361280), (5, 4289024), (8, 2680640), (10, 2144512), (16, 1340320), (20, 1072256), (32, 670160), (40, 536128), (64, 335080), (80, 268064), (128, 167540), (160, 134032), (256, 83770), (320, 67016), (512, 41885), (640, 33508), (1280, 16754), (2560, 8377)]