19800855

素因数分解:

$3^5\times 5^1\times {\mathrm{43}}^1\times {\mathrm{379}}^1$

素因数の和:442

約数の個数: 48

約数和(自身を含む): 36516480

約数和(自身を除く): 16715625

約数列:

[1, 3, 5, 9, 15, 27, 43, 45, 81, 129, 135, 215, 243, 379, 387, 405, 645, 1137, 1161, 1215, 1895, 1935, 3411, 3483, 5685, 5805, 10233, 10449, 16297, 17055, 17415, 30699, 48891, 51165, 52245, 81485, 92097, 146673, 153495, 244455, 440019, 460485, 733365, 1320057, 2200095, 3960171, 6600285, 19800855]

約数ペア:

[(1, 19800855), (3, 6600285), (5, 3960171), (9, 2200095), (15, 1320057), (27, 733365), (43, 460485), (45, 440019), (81, 244455), (129, 153495), (135, 146673), (215, 92097), (243, 81485), (379, 52245), (387, 51165), (405, 48891), (645, 30699), (1137, 17415), (1161, 17055), (1215, 16297), (1895, 10449), (1935, 10233), (3411, 5805), (3483, 5685)]