1381660

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{71}}^1\times {\mathrm{139}}^1$

素因数の和:226

約数の個数: 48

約数和(自身を含む): 3386880

約数和(自身を除く): 2005220

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 71, 139, 140, 142, 278, 284, 355, 497, 556, 695, 710, 973, 994, 1390, 1420, 1946, 1988, 2485, 2780, 3892, 4865, 4970, 9730, 9869, 9940, 19460, 19738, 39476, 49345, 69083, 98690, 138166, 197380, 276332, 345415, 690830, 1381660]

約数ペア:

[(1, 1381660), (2, 690830), (4, 345415), (5, 276332), (7, 197380), (10, 138166), (14, 98690), (20, 69083), (28, 49345), (35, 39476), (70, 19738), (71, 19460), (139, 9940), (140, 9869), (142, 9730), (278, 4970), (284, 4865), (355, 3892), (497, 2780), (556, 2485), (695, 1988), (710, 1946), (973, 1420), (994, 1390)]