20791040

素因数分解:

$2^8\times 5^1\times {\mathrm{37}}^1\times {\mathrm{439}}^1$

素因数の和:497

約数の個数: 72

約数和(自身を含む): 51263520

約数和(自身を除く): 30472480

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 37, 40, 64, 74, 80, 128, 148, 160, 185, 256, 296, 320, 370, 439, 592, 640, 740, 878, 1184, 1280, 1480, 1756, 2195, 2368, 2960, 3512, 4390, 4736, 5920, 7024, 8780, 9472, 11840, 14048, 16243, 17560, 23680, 28096, 32486, 35120, 47360, 56192, 64972, 70240, 81215, 112384, 129944, 140480, 162430, 259888, 280960, 324860, 519776, 561920, 649720, 1039552, 1299440, 2079104, 2598880, 4158208, 5197760, 10395520, 20791040]

約数ペア:

[(1, 20791040), (2, 10395520), (4, 5197760), (5, 4158208), (8, 2598880), (10, 2079104), (16, 1299440), (20, 1039552), (32, 649720), (37, 561920), (40, 519776), (64, 324860), (74, 280960), (80, 259888), (128, 162430), (148, 140480), (160, 129944), (185, 112384), (256, 81215), (296, 70240), (320, 64972), (370, 56192), (439, 47360), (592, 35120), (640, 32486), (740, 28096), (878, 23680), (1184, 17560), (1280, 16243), (1480, 14048), (1756, 11840), (2195, 9472), (2368, 8780), (2960, 7024), (3512, 5920), (4390, 4736)]