21499849

素因数分解:

$7^1\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{37}}^1\times {\mathrm{257}}^1$

素因数の和:337

約数の個数: 32

約数和(自身を含む): 28235520

約数和(自身を除く): 6735671

約数列:

[1, 7, 17, 19, 37, 119, 133, 257, 259, 323, 629, 703, 1799, 2261, 4369, 4403, 4883, 4921, 9509, 11951, 30583, 34181, 66563, 83011, 83657, 161653, 180671, 581077, 1131571, 1264697, 3071407, 21499849]

約数ペア:

[(1, 21499849), (7, 3071407), (17, 1264697), (19, 1131571), (37, 581077), (119, 180671), (133, 161653), (257, 83657), (259, 83011), (323, 66563), (629, 34181), (703, 30583), (1799, 11951), (2261, 9509), (4369, 4921), (4403, 4883)]