21496815

素因数分解:

$3^2\times 5^1\times {\mathrm{37}}^1\times {\mathrm{12911}}^1$

素因数の和:12959

約数の個数: 24

約数和(自身を含む): 38271168

約数和(自身を除く): 16774353

約数列:

[1, 3, 5, 9, 15, 37, 45, 111, 185, 333, 555, 1665, 12911, 38733, 64555, 116199, 193665, 477707, 580995, 1433121, 2388535, 4299363, 7165605, 21496815]

約数ペア:

[(1, 21496815), (3, 7165605), (5, 4299363), (9, 2388535), (15, 1433121), (37, 580995), (45, 477707), (111, 193665), (185, 116199), (333, 64555), (555, 38733), (1665, 12911)]