81537040

素因数分解:

$2^4\times 5^1\times {\mathrm{13}}^1\times {\mathrm{78401}}^1$

素因数の和:78427

約数の個数: 40

約数和(自身を含む): 204158808

約数和(自身を除く): 122621768

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 40, 52, 65, 80, 104, 130, 208, 260, 520, 1040, 78401, 156802, 313604, 392005, 627208, 784010, 1019213, 1254416, 1568020, 2038426, 3136040, 4076852, 5096065, 6272080, 8153704, 10192130, 16307408, 20384260, 40768520, 81537040]

約数ペア:

[(1, 81537040), (2, 40768520), (4, 20384260), (5, 16307408), (8, 10192130), (10, 8153704), (13, 6272080), (16, 5096065), (20, 4076852), (26, 3136040), (40, 2038426), (52, 1568020), (65, 1254416), (80, 1019213), (104, 784010), (130, 627208), (208, 392005), (260, 313604), (520, 156802), (1040, 78401)]