201919990

素因数分解:

$2^1\times 5^1\times {\mathrm{23}}^1\times {\mathrm{47}}^1\times {\mathrm{18679}}^1$

素因数の和:18756

約数の個数: 32

約数和(自身を含む): 387348480

約数和(自身を除く): 185428490

約数列:

[1, 2, 5, 10, 23, 46, 47, 94, 115, 230, 235, 470, 1081, 2162, 5405, 10810, 18679, 37358, 93395, 186790, 429617, 859234, 877913, 1755826, 2148085, 4296170, 4389565, 8779130, 20191999, 40383998, 100959995, 201919990]

約数ペア:

[(1, 201919990), (2, 100959995), (5, 40383998), (10, 20191999), (23, 8779130), (46, 4389565), (47, 4296170), (94, 2148085), (115, 1755826), (230, 877913), (235, 859234), (470, 429617), (1081, 186790), (2162, 93395), (5405, 37358), (10810, 18679)]