21789560

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{41903}}^1$

素因数の和:41927

約数の個数: 32

約数和(自身を含む): 52799040

約数和(自身を除く): 31009480

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 52, 65, 104, 130, 260, 520, 41903, 83806, 167612, 209515, 335224, 419030, 544739, 838060, 1089478, 1676120, 2178956, 2723695, 4357912, 5447390, 10894780, 21789560]

約数ペア:

[(1, 21789560), (2, 10894780), (4, 5447390), (5, 4357912), (8, 2723695), (10, 2178956), (13, 1676120), (20, 1089478), (26, 838060), (40, 544739), (52, 419030), (65, 335224), (104, 209515), (130, 167612), (260, 83806), (520, 41903)]