20417008

素因数分解:

$2^4\times {\mathrm{23}}^1\times {\mathrm{109}}^1\times {\mathrm{509}}^1$

素因数の和:649

約数の個数: 40

約数和(自身を含む): 41738400

約数和(自身を除く): 21321392

約数列:

[1, 2, 4, 8, 16, 23, 46, 92, 109, 184, 218, 368, 436, 509, 872, 1018, 1744, 2036, 2507, 4072, 5014, 8144, 10028, 11707, 20056, 23414, 40112, 46828, 55481, 93656, 110962, 187312, 221924, 443848, 887696, 1276063, 2552126, 5104252, 10208504, 20417008]

約数ペア:

[(1, 20417008), (2, 10208504), (4, 5104252), (8, 2552126), (16, 1276063), (23, 887696), (46, 443848), (92, 221924), (109, 187312), (184, 110962), (218, 93656), (368, 55481), (436, 46828), (509, 40112), (872, 23414), (1018, 20056), (1744, 11707), (2036, 10028), (2507, 8144), (4072, 5014)]