20829920

素因数分解:

$2^5\times 5^1\times {\mathrm{211}}^1\times {\mathrm{617}}^1$

素因数の和:843

約数の個数: 48

約数和(自身を含む): 49524048

約数和(自身を除く): 28694128

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 80, 160, 211, 422, 617, 844, 1055, 1234, 1688, 2110, 2468, 3085, 3376, 4220, 4936, 6170, 6752, 8440, 9872, 12340, 16880, 19744, 24680, 33760, 49360, 98720, 130187, 260374, 520748, 650935, 1041496, 1301870, 2082992, 2603740, 4165984, 5207480, 10414960, 20829920]

約数ペア:

[(1, 20829920), (2, 10414960), (4, 5207480), (5, 4165984), (8, 2603740), (10, 2082992), (16, 1301870), (20, 1041496), (32, 650935), (40, 520748), (80, 260374), (160, 130187), (211, 98720), (422, 49360), (617, 33760), (844, 24680), (1055, 19744), (1234, 16880), (1688, 12340), (2110, 9872), (2468, 8440), (3085, 6752), (3376, 6170), (4220, 4936)]