21324745

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{31}}^1\times {\mathrm{557}}^1$

素因数の和:625

約数の個数: 32

約数和(自身を含む): 29998080

約数和(自身を除く): 8673335

約数列:

[1, 5, 13, 19, 31, 65, 95, 155, 247, 403, 557, 589, 1235, 2015, 2785, 2945, 7241, 7657, 10583, 17267, 36205, 38285, 52915, 86335, 137579, 224471, 328073, 687895, 1122355, 1640365, 4264949, 21324745]

約数ペア:

[(1, 21324745), (5, 4264949), (13, 1640365), (19, 1122355), (31, 687895), (65, 328073), (95, 224471), (155, 137579), (247, 86335), (403, 52915), (557, 38285), (589, 36205), (1235, 17267), (2015, 10583), (2785, 7657), (2945, 7241)]