401920

素因数分解:

$2^9\times 5^1\times {\mathrm{157}}^1$

素因数の和:180

約数の個数: 40

約数和(自身を含む): 969804

約数和(自身を除く): 567884

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 157, 160, 256, 314, 320, 512, 628, 640, 785, 1256, 1280, 1570, 2512, 2560, 3140, 5024, 6280, 10048, 12560, 20096, 25120, 40192, 50240, 80384, 100480, 200960, 401920]

約数ペア:

[(1, 401920), (2, 200960), (4, 100480), (5, 80384), (8, 50240), (10, 40192), (16, 25120), (20, 20096), (32, 12560), (40, 10048), (64, 6280), (80, 5024), (128, 3140), (157, 2560), (160, 2512), (256, 1570), (314, 1280), (320, 1256), (512, 785), (628, 640)]