21385965

素因数分解:

$3^1\times 5^1\times {\mathrm{271}}^1\times {\mathrm{5261}}^1$

素因数の和:5540

約数の個数: 16

約数和(自身を含む): 34350336

約数和(自身を除く): 12964371

約数列:

[1, 3, 5, 15, 271, 813, 1355, 4065, 5261, 15783, 26305, 78915, 1425731, 4277193, 7128655, 21385965]

約数ペア:

[(1, 21385965), (3, 7128655), (5, 4277193), (15, 1425731), (271, 78915), (813, 26305), (1355, 15783), (4065, 5261)]