21053739

素因数分解:

$3^1\times 7^1\times {\mathrm{29}}^1\times {\mathrm{181}}^1\times {\mathrm{191}}^1$

素因数の和:411

約数の個数: 32

約数和(自身を含む): 33546240

約数和(自身を除く): 12492501

約数列:

[1, 3, 7, 21, 29, 87, 181, 191, 203, 543, 573, 609, 1267, 1337, 3801, 4011, 5249, 5539, 15747, 16617, 34571, 36743, 38773, 103713, 110229, 116319, 241997, 725991, 1002559, 3007677, 7017913, 21053739]

約数ペア:

[(1, 21053739), (3, 7017913), (7, 3007677), (21, 1002559), (29, 725991), (87, 241997), (181, 116319), (191, 110229), (203, 103713), (543, 38773), (573, 36743), (609, 34571), (1267, 16617), (1337, 15747), (3801, 5539), (4011, 5249)]