81238640

素因数分解:

$2^4\times 5^1\times 7^1\times {\mathrm{145069}}^1$

素因数の和:145089

約数の個数: 40

約数和(自身を含む): 215864160

約数和(自身を除く): 134625520

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 35, 40, 56, 70, 80, 112, 140, 280, 560, 145069, 290138, 580276, 725345, 1015483, 1160552, 1450690, 2030966, 2321104, 2901380, 4061932, 5077415, 5802760, 8123864, 10154830, 11605520, 16247728, 20309660, 40619320, 81238640]

約数ペア:

[(1, 81238640), (2, 40619320), (4, 20309660), (5, 16247728), (7, 11605520), (8, 10154830), (10, 8123864), (14, 5802760), (16, 5077415), (20, 4061932), (28, 2901380), (35, 2321104), (40, 2030966), (56, 1450690), (70, 1160552), (80, 1015483), (112, 725345), (140, 580276), (280, 290138), (560, 145069)]