21207555

素因数分解:

$3^3\times 5^1\times {\mathrm{29}}^1\times {\mathrm{5417}}^1$

素因数の和:5460

約数の個数: 32

約数和(自身を含む): 39009600

約数和(自身を除く): 17802045

約数列:

[1, 3, 5, 9, 15, 27, 29, 45, 87, 135, 145, 261, 435, 783, 1305, 3915, 5417, 16251, 27085, 48753, 81255, 146259, 157093, 243765, 471279, 731295, 785465, 1413837, 2356395, 4241511, 7069185, 21207555]

約数ペア:

[(1, 21207555), (3, 7069185), (5, 4241511), (9, 2356395), (15, 1413837), (27, 785465), (29, 731295), (45, 471279), (87, 243765), (135, 157093), (145, 146259), (261, 81255), (435, 48753), (783, 27085), (1305, 16251), (3915, 5417)]