21904755

素因数分解:

$3^1\times 5^1\times {\mathrm{17}}^2\times {\mathrm{31}}^1\times {\mathrm{163}}^1$

素因数の和:236

約数の個数: 48

約数和(自身を含む): 38667264

約数和(自身を除く): 16762509

約数列:

[1, 3, 5, 15, 17, 31, 51, 85, 93, 155, 163, 255, 289, 465, 489, 527, 815, 867, 1445, 1581, 2445, 2635, 2771, 4335, 5053, 7905, 8313, 8959, 13855, 15159, 25265, 26877, 41565, 44795, 47107, 75795, 85901, 134385, 141321, 235535, 257703, 429505, 706605, 1288515, 1460317, 4380951, 7301585, 21904755]

約数ペア:

[(1, 21904755), (3, 7301585), (5, 4380951), (15, 1460317), (17, 1288515), (31, 706605), (51, 429505), (85, 257703), (93, 235535), (155, 141321), (163, 134385), (255, 85901), (289, 75795), (465, 47107), (489, 44795), (527, 41565), (815, 26877), (867, 25265), (1445, 15159), (1581, 13855), (2445, 8959), (2635, 8313), (2771, 7905), (4335, 5053)]