21563152

素因数分解:

$2^4\times {\mathrm{13}}^1\times {\mathrm{103669}}^1$

素因数の和:103690

約数の個数: 20

約数和(自身を含む): 44992780

約数和(自身を除く): 23429628

約数列:

[1, 2, 4, 8, 13, 16, 26, 52, 104, 208, 103669, 207338, 414676, 829352, 1347697, 1658704, 2695394, 5390788, 10781576, 21563152]

約数ペア:

[(1, 21563152), (2, 10781576), (4, 5390788), (8, 2695394), (13, 1658704), (16, 1347697), (26, 829352), (52, 414676), (104, 207338), (208, 103669)]