21350555

素因数分解:

$5^1\times {\mathrm{17}}^1\times {\mathrm{23}}^1\times {\mathrm{67}}^1\times {\mathrm{163}}^1$

素因数の和:275

約数の個数: 32

約数和(自身を含む): 28905984

約数和(自身を除く): 7555429

約数列:

[1, 5, 17, 23, 67, 85, 115, 163, 335, 391, 815, 1139, 1541, 1955, 2771, 3749, 5695, 7705, 10921, 13855, 18745, 26197, 54605, 63733, 130985, 185657, 251183, 318665, 928285, 1255915, 4270111, 21350555]

約数ペア:

[(1, 21350555), (5, 4270111), (17, 1255915), (23, 928285), (67, 318665), (85, 251183), (115, 185657), (163, 130985), (335, 63733), (391, 54605), (815, 26197), (1139, 18745), (1541, 13855), (1955, 10921), (2771, 7705), (3749, 5695)]