128621185

素因数分解:

$5^1\times 7^1\times {\mathrm{11}}^4\times {\mathrm{251}}^1$

素因数の和:307

約数の個数: 40

約数和(自身を含む): 194806080

約数和(自身を除く): 66184895

約数列:

[1, 5, 7, 11, 35, 55, 77, 121, 251, 385, 605, 847, 1255, 1331, 1757, 2761, 4235, 6655, 8785, 9317, 13805, 14641, 19327, 30371, 46585, 73205, 96635, 102487, 151855, 212597, 334081, 512435, 1062985, 1670405, 2338567, 3674891, 11692835, 18374455, 25724237, 128621185]

約数ペア:

[(1, 128621185), (5, 25724237), (7, 18374455), (11, 11692835), (35, 3674891), (55, 2338567), (77, 1670405), (121, 1062985), (251, 512435), (385, 334081), (605, 212597), (847, 151855), (1255, 102487), (1331, 96635), (1757, 73205), (2761, 46585), (4235, 30371), (6655, 19327), (8785, 14641), (9317, 13805)]