21998085

素因数分解:

$3^1\times 5^1\times {\mathrm{17}}^1\times {\mathrm{281}}^1\times {\mathrm{307}}^1$

素因数の和:613

約数の個数: 32

約数和(自身を含む): 37521792

約数和(自身を除く): 15523707

約数列:

[1, 3, 5, 15, 17, 51, 85, 255, 281, 307, 843, 921, 1405, 1535, 4215, 4605, 4777, 5219, 14331, 15657, 23885, 26095, 71655, 78285, 86267, 258801, 431335, 1294005, 1466539, 4399617, 7332695, 21998085]

約数ペア:

[(1, 21998085), (3, 7332695), (5, 4399617), (15, 1466539), (17, 1294005), (51, 431335), (85, 258801), (255, 86267), (281, 78285), (307, 71655), (843, 26095), (921, 23885), (1405, 15657), (1535, 14331), (4215, 5219), (4605, 4777)]