9878920

素因数分解:

$2^3\times 5^1\times {\mathrm{491}}^1\times {\mathrm{503}}^1$

素因数の和:1005

約数の個数: 32

約数和(自身を含む): 22317120

約数和(自身を除く): 12438200

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 491, 503, 982, 1006, 1964, 2012, 2455, 2515, 3928, 4024, 4910, 5030, 9820, 10060, 19640, 20120, 246973, 493946, 987892, 1234865, 1975784, 2469730, 4939460, 9878920]

約数ペア:

[(1, 9878920), (2, 4939460), (4, 2469730), (5, 1975784), (8, 1234865), (10, 987892), (20, 493946), (40, 246973), (491, 20120), (503, 19640), (982, 10060), (1006, 9820), (1964, 5030), (2012, 4910), (2455, 4024), (2515, 3928)]