19938920

素因数分解:

$2^3\times 5^1\times {\mathrm{503}}^1\times {\mathrm{991}}^1$

素因数の和:1505

約数の個数: 32

約数和(自身を含む): 44997120

約数和(自身を除く): 25058200

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 503, 991, 1006, 1982, 2012, 2515, 3964, 4024, 4955, 5030, 7928, 9910, 10060, 19820, 20120, 39640, 498473, 996946, 1993892, 2492365, 3987784, 4984730, 9969460, 19938920]

約数ペア:

[(1, 19938920), (2, 9969460), (4, 4984730), (5, 3987784), (8, 2492365), (10, 1993892), (20, 996946), (40, 498473), (503, 39640), (991, 20120), (1006, 19820), (1982, 10060), (2012, 9910), (2515, 7928), (3964, 5030), (4024, 4955)]