20619385

素因数分解:

$5^1\times {\mathrm{17}}^1\times {\mathrm{23}}^1\times {\mathrm{53}}^1\times {\mathrm{199}}^1$

素因数の和:297

約数の個数: 32

約数和(自身を含む): 27993600

約数和(自身を除く): 7374215

約数列:

[1, 5, 17, 23, 53, 85, 115, 199, 265, 391, 901, 995, 1219, 1955, 3383, 4505, 4577, 6095, 10547, 16915, 20723, 22885, 52735, 77809, 103615, 179299, 242581, 389045, 896495, 1212905, 4123877, 20619385]

約数ペア:

[(1, 20619385), (5, 4123877), (17, 1212905), (23, 896495), (53, 389045), (85, 242581), (115, 179299), (199, 103615), (265, 77809), (391, 52735), (901, 22885), (995, 20723), (1219, 16915), (1955, 10547), (3383, 6095), (4505, 4577)]