21761853

素因数分解:

$3^1\times {\mathrm{17}}^1\times {\mathrm{53}}^1\times {\mathrm{83}}^1\times {\mathrm{97}}^1$

素因数の和:253

約数の個数: 32

約数和(自身を含む): 32006016

約数和(自身を除く): 10244163

約数列:

[1, 3, 17, 51, 53, 83, 97, 159, 249, 291, 901, 1411, 1649, 2703, 4233, 4399, 4947, 5141, 8051, 13197, 15423, 24153, 74783, 87397, 136867, 224349, 262191, 410601, 426703, 1280109, 7253951, 21761853]

約数ペア:

[(1, 21761853), (3, 7253951), (17, 1280109), (51, 426703), (53, 410601), (83, 262191), (97, 224349), (159, 136867), (249, 87397), (291, 74783), (901, 24153), (1411, 15423), (1649, 13197), (2703, 8051), (4233, 5141), (4399, 4947)]