19845891

素因数分解:

$3^4\times {\mathrm{13}}^1\times {\mathrm{47}}^1\times {\mathrm{401}}^1$

素因数の和:473

約数の個数: 40

約数和(自身を含む): 32687424

約数和(自身を除く): 12841533

約数列:

[1, 3, 9, 13, 27, 39, 47, 81, 117, 141, 351, 401, 423, 611, 1053, 1203, 1269, 1833, 3609, 3807, 5213, 5499, 10827, 15639, 16497, 18847, 32481, 46917, 49491, 56541, 140751, 169623, 245011, 422253, 508869, 735033, 1526607, 2205099, 6615297, 19845891]

約数ペア:

[(1, 19845891), (3, 6615297), (9, 2205099), (13, 1526607), (27, 735033), (39, 508869), (47, 422253), (81, 245011), (117, 169623), (141, 140751), (351, 56541), (401, 49491), (423, 46917), (611, 32481), (1053, 18847), (1203, 16497), (1269, 15639), (1833, 10827), (3609, 5499), (3807, 5213)]