19840

素因数分解:

$2^7\times 5^1\times {\mathrm{31}}^1$

素因数の和:50

約数の個数: 32

約数和(自身を含む): 48960

約数和(自身を除く): 29120

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 31, 32, 40, 62, 64, 80, 124, 128, 155, 160, 248, 310, 320, 496, 620, 640, 992, 1240, 1984, 2480, 3968, 4960, 9920, 19840]

約数ペア:

[(1, 19840), (2, 9920), (4, 4960), (5, 3968), (8, 2480), (10, 1984), (16, 1240), (20, 992), (31, 640), (32, 620), (40, 496), (62, 320), (64, 310), (80, 248), (124, 160), (128, 155)]