21881748

素因数分解:

$2^2\times 3^1\times 7^1\times {\mathrm{331}}^1\times {\mathrm{787}}^1$

素因数の和:1132

約数の個数: 48

約数和(自身を含む): 58601984

約数和(自身を除く): 36720236

約数列:

[1, 2, 3, 4, 6, 7, 12, 14, 21, 28, 42, 84, 331, 662, 787, 993, 1324, 1574, 1986, 2317, 2361, 3148, 3972, 4634, 4722, 5509, 6951, 9268, 9444, 11018, 13902, 16527, 22036, 27804, 33054, 66108, 260497, 520994, 781491, 1041988, 1562982, 1823479, 3125964, 3646958, 5470437, 7293916, 10940874, 21881748]

約数ペア:

[(1, 21881748), (2, 10940874), (3, 7293916), (4, 5470437), (6, 3646958), (7, 3125964), (12, 1823479), (14, 1562982), (21, 1041988), (28, 781491), (42, 520994), (84, 260497), (331, 66108), (662, 33054), (787, 27804), (993, 22036), (1324, 16527), (1574, 13902), (1986, 11018), (2317, 9444), (2361, 9268), (3148, 6951), (3972, 5509), (4634, 4722)]