19991840

素因数分解:

$2^5\times 5^1\times {\mathrm{11}}^1\times {\mathrm{37}}^1\times {\mathrm{307}}^1$

素因数の和:370

約数の個数: 96

約数和(自身を含む): 53089344

約数和(自身を除く): 33097504

約数列:

[1, 2, 4, 5, 8, 10, 11, 16, 20, 22, 32, 37, 40, 44, 55, 74, 80, 88, 110, 148, 160, 176, 185, 220, 296, 307, 352, 370, 407, 440, 592, 614, 740, 814, 880, 1184, 1228, 1480, 1535, 1628, 1760, 2035, 2456, 2960, 3070, 3256, 3377, 4070, 4912, 5920, 6140, 6512, 6754, 8140, 9824, 11359, 12280, 13024, 13508, 16280, 16885, 22718, 24560, 27016, 32560, 33770, 45436, 49120, 54032, 56795, 65120, 67540, 90872, 108064, 113590, 124949, 135080, 181744, 227180, 249898, 270160, 363488, 454360, 499796, 540320, 624745, 908720, 999592, 1249490, 1817440, 1999184, 2498980, 3998368, 4997960, 9995920, 19991840]

約数ペア:

[(1, 19991840), (2, 9995920), (4, 4997960), (5, 3998368), (8, 2498980), (10, 1999184), (11, 1817440), (16, 1249490), (20, 999592), (22, 908720), (32, 624745), (37, 540320), (40, 499796), (44, 454360), (55, 363488), (74, 270160), (80, 249898), (88, 227180), (110, 181744), (148, 135080), (160, 124949), (176, 113590), (185, 108064), (220, 90872), (296, 67540), (307, 65120), (352, 56795), (370, 54032), (407, 49120), (440, 45436), (592, 33770), (614, 32560), (740, 27016), (814, 24560), (880, 22718), (1184, 16885), (1228, 16280), (1480, 13508), (1535, 13024), (1628, 12280), (1760, 11359), (2035, 9824), (2456, 8140), (2960, 6754), (3070, 6512), (3256, 6140), (3377, 5920), (4070, 4912)]