21081178

素因数分解:

$2^1\times {\mathrm{31}}^1\times {\mathrm{71}}^1\times {\mathrm{4789}}^1$

素因数の和:4893

約数の個数: 16

約数和(自身を含む): 33108480

約数和(自身を除く): 12027302

約数列:

[1, 2, 31, 62, 71, 142, 2201, 4402, 4789, 9578, 148459, 296918, 340019, 680038, 10540589, 21081178]

約数ペア:

[(1, 21081178), (2, 10540589), (31, 680038), (62, 340019), (71, 296918), (142, 148459), (2201, 9578), (4402, 4789)]