21178736

素因数分解:

$2^4\times {\mathrm{17}}^1\times {\mathrm{77863}}^1$

素因数の和:77888

約数の個数: 20

約数和(自身を含む): 43448112

約数和(自身を除く): 22269376

約数列:

[1, 2, 4, 8, 16, 17, 34, 68, 136, 272, 77863, 155726, 311452, 622904, 1245808, 1323671, 2647342, 5294684, 10589368, 21178736]

約数ペア:

[(1, 21178736), (2, 10589368), (4, 5294684), (8, 2647342), (16, 1323671), (17, 1245808), (34, 622904), (68, 311452), (136, 155726), (272, 77863)]