21816320

素因数分解:

$2^{10}\times 5^1\times {\mathrm{4261}}^1$

素因数の和:4286

約数の個数: 44

約数和(自身を含む): 52345884

約数和(自身を除く): 30529564

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 160, 256, 320, 512, 640, 1024, 1280, 2560, 4261, 5120, 8522, 17044, 21305, 34088, 42610, 68176, 85220, 136352, 170440, 272704, 340880, 545408, 681760, 1090816, 1363520, 2181632, 2727040, 4363264, 5454080, 10908160, 21816320]

約数ペア:

[(1, 21816320), (2, 10908160), (4, 5454080), (5, 4363264), (8, 2727040), (10, 2181632), (16, 1363520), (20, 1090816), (32, 681760), (40, 545408), (64, 340880), (80, 272704), (128, 170440), (160, 136352), (256, 85220), (320, 68176), (512, 42610), (640, 34088), (1024, 21305), (1280, 17044), (2560, 8522), (4261, 5120)]