21108645

素因数分解:

$3^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{41}}^1\times {\mathrm{673}}^1$

素因数の和:742

約数の個数: 48

約数和(自身を含む): 39744432

約数和(自身を除く): 18635787

約数列:

[1, 3, 5, 9, 15, 17, 41, 45, 51, 85, 123, 153, 205, 255, 369, 615, 673, 697, 765, 1845, 2019, 2091, 3365, 3485, 6057, 6273, 10095, 10455, 11441, 27593, 30285, 31365, 34323, 57205, 82779, 102969, 137965, 171615, 248337, 413895, 469081, 514845, 1241685, 1407243, 2345405, 4221729, 7036215, 21108645]

約数ペア:

[(1, 21108645), (3, 7036215), (5, 4221729), (9, 2345405), (15, 1407243), (17, 1241685), (41, 514845), (45, 469081), (51, 413895), (85, 248337), (123, 171615), (153, 137965), (205, 102969), (255, 82779), (369, 57205), (615, 34323), (673, 31365), (697, 30285), (765, 27593), (1845, 11441), (2019, 10455), (2091, 10095), (3365, 6273), (3485, 6057)]