81254180

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{349}}^1\times {\mathrm{1663}}^1$

素因数の和:2028

約数の個数: 48

約数和(自身を含む): 195686400

約数和(自身を除く): 114432220

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 349, 698, 1396, 1663, 1745, 2443, 3326, 3490, 4886, 6652, 6980, 8315, 9772, 11641, 12215, 16630, 23282, 24430, 33260, 46564, 48860, 58205, 116410, 232820, 580387, 1160774, 2321548, 2901935, 4062709, 5803870, 8125418, 11607740, 16250836, 20313545, 40627090, 81254180]

約数ペア:

[(1, 81254180), (2, 40627090), (4, 20313545), (5, 16250836), (7, 11607740), (10, 8125418), (14, 5803870), (20, 4062709), (28, 2901935), (35, 2321548), (70, 1160774), (140, 580387), (349, 232820), (698, 116410), (1396, 58205), (1663, 48860), (1745, 46564), (2443, 33260), (3326, 24430), (3490, 23282), (4886, 16630), (6652, 12215), (6980, 11641), (8315, 9772)]