21857528

素因数分解:

$2^3\times 7^2\times {\mathrm{11}}^1\times {\mathrm{37}}^1\times {\mathrm{137}}^1$

素因数の和:205

約数の個数: 96

約数和(自身を含む): 53803440

約数和(自身を除く): 31945912

約数列:

[1, 2, 4, 7, 8, 11, 14, 22, 28, 37, 44, 49, 56, 74, 77, 88, 98, 137, 148, 154, 196, 259, 274, 296, 308, 392, 407, 518, 539, 548, 616, 814, 959, 1036, 1078, 1096, 1507, 1628, 1813, 1918, 2072, 2156, 2849, 3014, 3256, 3626, 3836, 4312, 5069, 5698, 6028, 6713, 7252, 7672, 10138, 10549, 11396, 12056, 13426, 14504, 19943, 20276, 21098, 22792, 26852, 35483, 39886, 40552, 42196, 53704, 55759, 70966, 73843, 79772, 84392, 111518, 141932, 147686, 159544, 223036, 248381, 283864, 295372, 390313, 446072, 496762, 590744, 780626, 993524, 1561252, 1987048, 2732191, 3122504, 5464382, 10928764, 21857528]

約数ペア:

[(1, 21857528), (2, 10928764), (4, 5464382), (7, 3122504), (8, 2732191), (11, 1987048), (14, 1561252), (22, 993524), (28, 780626), (37, 590744), (44, 496762), (49, 446072), (56, 390313), (74, 295372), (77, 283864), (88, 248381), (98, 223036), (137, 159544), (148, 147686), (154, 141932), (196, 111518), (259, 84392), (274, 79772), (296, 73843), (308, 70966), (392, 55759), (407, 53704), (518, 42196), (539, 40552), (548, 39886), (616, 35483), (814, 26852), (959, 22792), (1036, 21098), (1078, 20276), (1096, 19943), (1507, 14504), (1628, 13426), (1813, 12056), (1918, 11396), (2072, 10549), (2156, 10138), (2849, 7672), (3014, 7252), (3256, 6713), (3626, 6028), (3836, 5698), (4312, 5069)]