21500860

素因数分解:

$2^2\times 5^1\times {\mathrm{23}}^1\times {\mathrm{43}}^1\times {\mathrm{1087}}^1$

素因数の和:1162

約数の個数: 48

約数和(自身を含む): 48254976

約数和(自身を除く): 26754116

約数列:

[1, 2, 4, 5, 10, 20, 23, 43, 46, 86, 92, 115, 172, 215, 230, 430, 460, 860, 989, 1087, 1978, 2174, 3956, 4348, 4945, 5435, 9890, 10870, 19780, 21740, 25001, 46741, 50002, 93482, 100004, 125005, 186964, 233705, 250010, 467410, 500020, 934820, 1075043, 2150086, 4300172, 5375215, 10750430, 21500860]

約数ペア:

[(1, 21500860), (2, 10750430), (4, 5375215), (5, 4300172), (10, 2150086), (20, 1075043), (23, 934820), (43, 500020), (46, 467410), (86, 250010), (92, 233705), (115, 186964), (172, 125005), (215, 100004), (230, 93482), (430, 50002), (460, 46741), (860, 25001), (989, 21740), (1087, 19780), (1978, 10870), (2174, 9890), (3956, 5435), (4348, 4945)]