20158720

素因数分解:

$2^8\times 5^1\times {\mathrm{15749}}^1$

素因数の和:15770

約数の個数: 36

約数和(自身を含む): 48289500

約数和(自身を除く): 28130780

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 160, 256, 320, 640, 1280, 15749, 31498, 62996, 78745, 125992, 157490, 251984, 314980, 503968, 629960, 1007936, 1259920, 2015872, 2519840, 4031744, 5039680, 10079360, 20158720]

約数ペア:

[(1, 20158720), (2, 10079360), (4, 5039680), (5, 4031744), (8, 2519840), (10, 2015872), (16, 1259920), (20, 1007936), (32, 629960), (40, 503968), (64, 314980), (80, 251984), (128, 157490), (160, 125992), (256, 78745), (320, 62996), (640, 31498), (1280, 15749)]