21072376

素因数分解:

$2^3\times {\mathrm{13}}^1\times {\mathrm{53}}^1\times {\mathrm{3823}}^1$

素因数の和:3895

約数の個数: 32

約数和(自身を含む): 43364160

約数和(自身を除く): 22291784

約数列:

[1, 2, 4, 8, 13, 26, 52, 53, 104, 106, 212, 424, 689, 1378, 2756, 3823, 5512, 7646, 15292, 30584, 49699, 99398, 198796, 202619, 397592, 405238, 810476, 1620952, 2634047, 5268094, 10536188, 21072376]

約数ペア:

[(1, 21072376), (2, 10536188), (4, 5268094), (8, 2634047), (13, 1620952), (26, 810476), (52, 405238), (53, 397592), (104, 202619), (106, 198796), (212, 99398), (424, 49699), (689, 30584), (1378, 15292), (2756, 7646), (3823, 5512)]