20496221680

素因数分解:

$2^4\times 5^1\times {\mathrm{11}}^1\times {\mathrm{73}}^1\times {\mathrm{319057}}^1$

素因数の和:319154

約数の個数: 80

約数和(自身を含む): 52698171744

約数和(自身を除く): 32201950064

約数列:

[1, 2, 4, 5, 8, 10, 11, 16, 20, 22, 40, 44, 55, 73, 80, 88, 110, 146, 176, 220, 292, 365, 440, 584, 730, 803, 880, 1168, 1460, 1606, 2920, 3212, 4015, 5840, 6424, 8030, 12848, 16060, 32120, 64240, 319057, 638114, 1276228, 1595285, 2552456, 3190570, 3509627, 5104912, 6381140, 7019254, 12762280, 14038508, 17548135, 23291161, 25524560, 28077016, 35096270, 46582322, 56154032, 70192540, 93164644, 116455805, 140385080, 186329288, 232911610, 256202771, 280770160, 372658576, 465823220, 512405542, 931646440, 1024811084, 1281013855, 1863292880, 2049622168, 2562027710, 4099244336, 5124055420, 10248110840, 20496221680]

約数ペア:

[(1, 20496221680), (2, 10248110840), (4, 5124055420), (5, 4099244336), (8, 2562027710), (10, 2049622168), (11, 1863292880), (16, 1281013855), (20, 1024811084), (22, 931646440), (40, 512405542), (44, 465823220), (55, 372658576), (73, 280770160), (80, 256202771), (88, 232911610), (110, 186329288), (146, 140385080), (176, 116455805), (220, 93164644), (292, 70192540), (365, 56154032), (440, 46582322), (584, 35096270), (730, 28077016), (803, 25524560), (880, 23291161), (1168, 17548135), (1460, 14038508), (1606, 12762280), (2920, 7019254), (3212, 6381140), (4015, 5104912), (5840, 3509627), (6424, 3190570), (8030, 2552456), (12848, 1595285), (16060, 1276228), (32120, 638114), (64240, 319057)]