21505782

素因数分解:

$2^1\times 3^1\times {\mathrm{17}}^1\times {\mathrm{23}}^1\times {\mathrm{89}}^1\times {\mathrm{103}}^1$

素因数の和:237

約数の個数: 64

約数和(自身を含む): 48522240

約数和(自身を除く): 27016458

約数列:

[1, 2, 3, 6, 17, 23, 34, 46, 51, 69, 89, 102, 103, 138, 178, 206, 267, 309, 391, 534, 618, 782, 1173, 1513, 1751, 2047, 2346, 2369, 3026, 3502, 4094, 4539, 4738, 5253, 6141, 7107, 9078, 9167, 10506, 12282, 14214, 18334, 27501, 34799, 40273, 55002, 69598, 80546, 104397, 120819, 155839, 208794, 210841, 241638, 311678, 421682, 467517, 632523, 935034, 1265046, 3584297, 7168594, 10752891, 21505782]

約数ペア:

[(1, 21505782), (2, 10752891), (3, 7168594), (6, 3584297), (17, 1265046), (23, 935034), (34, 632523), (46, 467517), (51, 421682), (69, 311678), (89, 241638), (102, 210841), (103, 208794), (138, 155839), (178, 120819), (206, 104397), (267, 80546), (309, 69598), (391, 55002), (534, 40273), (618, 34799), (782, 27501), (1173, 18334), (1513, 14214), (1751, 12282), (2047, 10506), (2346, 9167), (2369, 9078), (3026, 7107), (3502, 6141), (4094, 5253), (4539, 4738)]