81779840

素因数分解:

$2^7\times 5^1\times {\mathrm{127781}}^1$

素因数の和:127800

約数の個数: 32

約数和(自身を含む): 195506460

約数和(自身を除く): 113726620

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 160, 320, 640, 127781, 255562, 511124, 638905, 1022248, 1277810, 2044496, 2555620, 4088992, 5111240, 8177984, 10222480, 16355968, 20444960, 40889920, 81779840]

約数ペア:

[(1, 81779840), (2, 40889920), (4, 20444960), (5, 16355968), (8, 10222480), (10, 8177984), (16, 5111240), (20, 4088992), (32, 2555620), (40, 2044496), (64, 1277810), (80, 1022248), (128, 638905), (160, 511124), (320, 255562), (640, 127781)]