2439980

素因数分解:

$2^2\times 5^1\times {\mathrm{19}}^1\times {\mathrm{6421}}^1$

素因数の和:6449

約数の個数: 24

約数和(自身を含む): 5394480

約数和(自身を除く): 2954500

約数列:

[1, 2, 4, 5, 10, 19, 20, 38, 76, 95, 190, 380, 6421, 12842, 25684, 32105, 64210, 121999, 128420, 243998, 487996, 609995, 1219990, 2439980]

約数ペア:

[(1, 2439980), (2, 1219990), (4, 609995), (5, 487996), (10, 243998), (19, 128420), (20, 121999), (38, 64210), (76, 32105), (95, 25684), (190, 12842), (380, 6421)]