81380480

素因数分解:

$2^7\times 5^1\times {\mathrm{127157}}^1$

素因数の和:127176

約数の個数: 32

約数和(自身を含む): 194551740

約数和(自身を除く): 113171260

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 160, 320, 640, 127157, 254314, 508628, 635785, 1017256, 1271570, 2034512, 2543140, 4069024, 5086280, 8138048, 10172560, 16276096, 20345120, 40690240, 81380480]

約数ペア:

[(1, 81380480), (2, 40690240), (4, 20345120), (5, 16276096), (8, 10172560), (10, 8138048), (16, 5086280), (20, 4069024), (32, 2543140), (40, 2034512), (64, 1271570), (80, 1017256), (128, 635785), (160, 508628), (320, 254314), (640, 127157)]