51387680

素因数分解:

$2^5\times 5^1\times {\mathrm{397}}^1\times {\mathrm{809}}^1$

素因数の和:1221

約数の個数: 48

約数和(自身を含む): 121859640

約数和(自身を除く): 70471960

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 80, 160, 397, 794, 809, 1588, 1618, 1985, 3176, 3236, 3970, 4045, 6352, 6472, 7940, 8090, 12704, 12944, 15880, 16180, 25888, 31760, 32360, 63520, 64720, 129440, 321173, 642346, 1284692, 1605865, 2569384, 3211730, 5138768, 6423460, 10277536, 12846920, 25693840, 51387680]

約数ペア:

[(1, 51387680), (2, 25693840), (4, 12846920), (5, 10277536), (8, 6423460), (10, 5138768), (16, 3211730), (20, 2569384), (32, 1605865), (40, 1284692), (80, 642346), (160, 321173), (397, 129440), (794, 64720), (809, 63520), (1588, 32360), (1618, 31760), (1985, 25888), (3176, 16180), (3236, 15880), (3970, 12944), (4045, 12704), (6352, 8090), (6472, 7940)]