21995678

素因数分解:

$2^1\times {\mathrm{31}}^1\times {\mathrm{149}}^1\times {\mathrm{2381}}^1$

素因数の和:2563

約数の個数: 16

約数和(自身を含む): 34300800

約数和(自身を除く): 12305122

約数列:

[1, 2, 31, 62, 149, 298, 2381, 4619, 4762, 9238, 73811, 147622, 354769, 709538, 10997839, 21995678]

約数ペア:

[(1, 21995678), (2, 10997839), (31, 709538), (62, 354769), (149, 147622), (298, 73811), (2381, 9238), (4619, 4762)]