21305488

素因数分解:

$2^4\times {\mathrm{17}}^1\times {\mathrm{29}}^1\times {\mathrm{37}}^1\times {\mathrm{73}}^1$

素因数の和:164

約数の個数: 80

約数和(自身を含む): 47072880

約数和(自身を除く): 25767392

約数列:

[1, 2, 4, 8, 16, 17, 29, 34, 37, 58, 68, 73, 74, 116, 136, 146, 148, 232, 272, 292, 296, 464, 493, 584, 592, 629, 986, 1073, 1168, 1241, 1258, 1972, 2117, 2146, 2482, 2516, 2701, 3944, 4234, 4292, 4964, 5032, 5402, 7888, 8468, 8584, 9928, 10064, 10804, 16936, 17168, 18241, 19856, 21608, 33872, 35989, 36482, 43216, 45917, 71978, 72964, 78329, 91834, 143956, 145928, 156658, 183668, 287912, 291856, 313316, 367336, 575824, 626632, 734672, 1253264, 1331593, 2663186, 5326372, 10652744, 21305488]

約数ペア:

[(1, 21305488), (2, 10652744), (4, 5326372), (8, 2663186), (16, 1331593), (17, 1253264), (29, 734672), (34, 626632), (37, 575824), (58, 367336), (68, 313316), (73, 291856), (74, 287912), (116, 183668), (136, 156658), (146, 145928), (148, 143956), (232, 91834), (272, 78329), (292, 72964), (296, 71978), (464, 45917), (493, 43216), (584, 36482), (592, 35989), (629, 33872), (986, 21608), (1073, 19856), (1168, 18241), (1241, 17168), (1258, 16936), (1972, 10804), (2117, 10064), (2146, 9928), (2482, 8584), (2516, 8468), (2701, 7888), (3944, 5402), (4234, 5032), (4292, 4964)]