21315203

素因数分解:

$7^1\times {\mathrm{13}}^1\times {\mathrm{29}}^1\times {\mathrm{41}}^1\times {\mathrm{197}}^1$

素因数の和:287

約数の個数: 32

約数和(自身を含む): 27941760

約数和(自身を除く): 6626557

約数列:

[1, 7, 13, 29, 41, 91, 197, 203, 287, 377, 533, 1189, 1379, 2561, 2639, 3731, 5713, 8077, 8323, 15457, 17927, 39991, 56539, 74269, 105001, 108199, 234233, 519883, 735007, 1639631, 3045029, 21315203]

約数ペア:

[(1, 21315203), (7, 3045029), (13, 1639631), (29, 735007), (41, 519883), (91, 234233), (197, 108199), (203, 105001), (287, 74269), (377, 56539), (533, 39991), (1189, 17927), (1379, 15457), (2561, 8323), (2639, 8077), (3731, 5713)]