21638360

素因数分解:

$2^3\times 5^1\times {\mathrm{269}}^1\times {\mathrm{2011}}^1$

素因数の和:2291

約数の個数: 32

約数和(自身を含む): 48891600

約数和(自身を除く): 27253240

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 269, 538, 1076, 1345, 2011, 2152, 2690, 4022, 5380, 8044, 10055, 10760, 16088, 20110, 40220, 80440, 540959, 1081918, 2163836, 2704795, 4327672, 5409590, 10819180, 21638360]

約数ペア:

[(1, 21638360), (2, 10819180), (4, 5409590), (5, 4327672), (8, 2704795), (10, 2163836), (20, 1081918), (40, 540959), (269, 80440), (538, 40220), (1076, 20110), (1345, 16088), (2011, 10760), (2152, 10055), (2690, 8044), (4022, 5380)]