21377115

素因数分解:

$3^4\times 5^1\times {\mathrm{52783}}^1$

素因数の和:52800

約数の個数: 20

約数和(自身を含む): 38321184

約数和(自身を除く): 16944069

約数列:

[1, 3, 5, 9, 15, 27, 45, 81, 135, 405, 52783, 158349, 263915, 475047, 791745, 1425141, 2375235, 4275423, 7125705, 21377115]

約数ペア:

[(1, 21377115), (3, 7125705), (5, 4275423), (9, 2375235), (15, 1425141), (27, 791745), (45, 475047), (81, 263915), (135, 158349), (405, 52783)]