21318650

素因数分解:

$2^1\times 5^2\times {\mathrm{647}}^1\times {\mathrm{659}}^1$

素因数の和:1318

約数の個数: 24

約数和(自身を含む): 39774240

約数和(自身を除く): 18455590

約数列:

[1, 2, 5, 10, 25, 50, 647, 659, 1294, 1318, 3235, 3295, 6470, 6590, 16175, 16475, 32350, 32950, 426373, 852746, 2131865, 4263730, 10659325, 21318650]

約数ペア:

[(1, 21318650), (2, 10659325), (5, 4263730), (10, 2131865), (25, 852746), (50, 426373), (647, 32950), (659, 32350), (1294, 16475), (1318, 16175), (3235, 6590), (3295, 6470)]