21078045

素因数分解:

$3^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{59}}^1\times {\mathrm{467}}^1$

素因数の和:554

約数の個数: 48

約数和(自身を含む): 39424320

約数和(自身を除く): 18346275

約数列:

[1, 3, 5, 9, 15, 17, 45, 51, 59, 85, 153, 177, 255, 295, 467, 531, 765, 885, 1003, 1401, 2335, 2655, 3009, 4203, 5015, 7005, 7939, 9027, 15045, 21015, 23817, 27553, 39695, 45135, 71451, 82659, 119085, 137765, 247977, 357255, 413295, 468401, 1239885, 1405203, 2342005, 4215609, 7026015, 21078045]

約数ペア:

[(1, 21078045), (3, 7026015), (5, 4215609), (9, 2342005), (15, 1405203), (17, 1239885), (45, 468401), (51, 413295), (59, 357255), (85, 247977), (153, 137765), (177, 119085), (255, 82659), (295, 71451), (467, 45135), (531, 39695), (765, 27553), (885, 23817), (1003, 21015), (1401, 15045), (2335, 9027), (2655, 7939), (3009, 7005), (4203, 5015)]