21167805

素因数分解:

$3^1\times 5^1\times {\mathrm{17}}^2\times {\mathrm{19}}^1\times {\mathrm{257}}^1$

素因数の和:318

約数の個数: 48

約数和(自身を含む): 38018880

約数和(自身を除く): 16851075

約数列:

[1, 3, 5, 15, 17, 19, 51, 57, 85, 95, 255, 257, 285, 289, 323, 771, 867, 969, 1285, 1445, 1615, 3855, 4335, 4369, 4845, 4883, 5491, 13107, 14649, 16473, 21845, 24415, 27455, 65535, 73245, 74273, 82365, 83011, 222819, 249033, 371365, 415055, 1114095, 1245165, 1411187, 4233561, 7055935, 21167805]

約数ペア:

[(1, 21167805), (3, 7055935), (5, 4233561), (15, 1411187), (17, 1245165), (19, 1114095), (51, 415055), (57, 371365), (85, 249033), (95, 222819), (255, 83011), (257, 82365), (285, 74273), (289, 73245), (323, 65535), (771, 27455), (867, 24415), (969, 21845), (1285, 16473), (1445, 14649), (1615, 13107), (3855, 5491), (4335, 4883), (4369, 4845)]