20318720

素因数分解:

$2^9\times 5^1\times {\mathrm{7937}}^1$

素因数の和:7960

約数の個数: 40

約数和(自身を含む): 48723444

約数和(自身を除く): 28404724

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 160, 256, 320, 512, 640, 1280, 2560, 7937, 15874, 31748, 39685, 63496, 79370, 126992, 158740, 253984, 317480, 507968, 634960, 1015936, 1269920, 2031872, 2539840, 4063744, 5079680, 10159360, 20318720]

約数ペア:

[(1, 20318720), (2, 10159360), (4, 5079680), (5, 4063744), (8, 2539840), (10, 2031872), (16, 1269920), (20, 1015936), (32, 634960), (40, 507968), (64, 317480), (80, 253984), (128, 158740), (160, 126992), (256, 79370), (320, 63496), (512, 39685), (640, 31748), (1280, 15874), (2560, 7937)]