20955280

素因数分解:

$2^4\times 5^1\times {\mathrm{163}}^1\times {\mathrm{1607}}^1$

素因数の和:1783

約数の個数: 40

約数和(自身を含む): 49050432

約数和(自身を除く): 28095152

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 163, 326, 652, 815, 1304, 1607, 1630, 2608, 3214, 3260, 6428, 6520, 8035, 12856, 13040, 16070, 25712, 32140, 64280, 128560, 261941, 523882, 1047764, 1309705, 2095528, 2619410, 4191056, 5238820, 10477640, 20955280]

約数ペア:

[(1, 20955280), (2, 10477640), (4, 5238820), (5, 4191056), (8, 2619410), (10, 2095528), (16, 1309705), (20, 1047764), (40, 523882), (80, 261941), (163, 128560), (326, 64280), (652, 32140), (815, 25712), (1304, 16070), (1607, 13040), (1630, 12856), (2608, 8035), (3214, 6520), (3260, 6428)]