21389810

素因数分解:

$2^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{137}}^1\times {\mathrm{1201}}^1$

素因数の和:1358

約数の個数: 32

約数和(自身を含む): 41800752

約数和(自身を除く): 20410942

約数列:

[1, 2, 5, 10, 13, 26, 65, 130, 137, 274, 685, 1201, 1370, 1781, 2402, 3562, 6005, 8905, 12010, 15613, 17810, 31226, 78065, 156130, 164537, 329074, 822685, 1645370, 2138981, 4277962, 10694905, 21389810]

約数ペア:

[(1, 21389810), (2, 10694905), (5, 4277962), (10, 2138981), (13, 1645370), (26, 822685), (65, 329074), (130, 164537), (137, 156130), (274, 78065), (685, 31226), (1201, 17810), (1370, 15613), (1781, 12010), (2402, 8905), (3562, 6005)]