19512981

素因数分解:

$3^4\times {\mathrm{19}}^1\times {\mathrm{31}}^1\times {\mathrm{409}}^1$

素因数の和:471

約数の個数: 40

約数和(自身を含む): 31750400

約数和(自身を除く): 12237419

約数列:

[1, 3, 9, 19, 27, 31, 57, 81, 93, 171, 279, 409, 513, 589, 837, 1227, 1539, 1767, 2511, 3681, 5301, 7771, 11043, 12679, 15903, 23313, 33129, 38037, 47709, 69939, 114111, 209817, 240901, 342333, 629451, 722703, 1026999, 2168109, 6504327, 19512981]

約数ペア:

[(1, 19512981), (3, 6504327), (9, 2168109), (19, 1026999), (27, 722703), (31, 629451), (57, 342333), (81, 240901), (93, 209817), (171, 114111), (279, 69939), (409, 47709), (513, 38037), (589, 33129), (837, 23313), (1227, 15903), (1539, 12679), (1767, 11043), (2511, 7771), (3681, 5301)]