18943209

素因数分解:

$3^2\times {\mathrm{19}}^1\times {\mathrm{47}}^1\times {\mathrm{2357}}^1$

素因数の和:2429

約数の個数: 24

約数和(自身を含む): 29427840

約数和(自身を除く): 10484631

約数列:

[1, 3, 9, 19, 47, 57, 141, 171, 423, 893, 2357, 2679, 7071, 8037, 21213, 44783, 110779, 134349, 332337, 403047, 997011, 2104801, 6314403, 18943209]

約数ペア:

[(1, 18943209), (3, 6314403), (9, 2104801), (19, 997011), (47, 403047), (57, 332337), (141, 134349), (171, 110779), (423, 44783), (893, 21213), (2357, 8037), (2679, 7071)]