54871640

素因数分解:

$2^3\times 5^1\times {\mathrm{71}}^1\times {\mathrm{139}}^2$

素因数の和:360

約数の個数: 48

約数和(自身を含む): 126107280

約数和(自身を除く): 71235640

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 71, 139, 142, 278, 284, 355, 556, 568, 695, 710, 1112, 1390, 1420, 2780, 2840, 5560, 9869, 19321, 19738, 38642, 39476, 49345, 77284, 78952, 96605, 98690, 154568, 193210, 197380, 386420, 394760, 772840, 1371791, 2743582, 5487164, 6858955, 10974328, 13717910, 27435820, 54871640]

約数ペア:

[(1, 54871640), (2, 27435820), (4, 13717910), (5, 10974328), (8, 6858955), (10, 5487164), (20, 2743582), (40, 1371791), (71, 772840), (139, 394760), (142, 386420), (278, 197380), (284, 193210), (355, 154568), (556, 98690), (568, 96605), (695, 78952), (710, 77284), (1112, 49345), (1390, 39476), (1420, 38642), (2780, 19738), (2840, 19321), (5560, 9869)]