988787180

素因数分解:

$2^2\times 5^1\times {\mathrm{71}}^1\times {\mathrm{311}}^1\times {\mathrm{2239}}^1$

素因数の和:2630

約数の個数: 48

約数和(自身を含む): 2113413120

約数和(自身を除く): 1124625940

約数列:

[1, 2, 4, 5, 10, 20, 71, 142, 284, 311, 355, 622, 710, 1244, 1420, 1555, 2239, 3110, 4478, 6220, 8956, 11195, 22081, 22390, 44162, 44780, 88324, 110405, 158969, 220810, 317938, 441620, 635876, 696329, 794845, 1392658, 1589690, 2785316, 3179380, 3481645, 6963290, 13926580, 49439359, 98878718, 197757436, 247196795, 494393590, 988787180]

約数ペア:

[(1, 988787180), (2, 494393590), (4, 247196795), (5, 197757436), (10, 98878718), (20, 49439359), (71, 13926580), (142, 6963290), (284, 3481645), (311, 3179380), (355, 2785316), (622, 1589690), (710, 1392658), (1244, 794845), (1420, 696329), (1555, 635876), (2239, 441620), (3110, 317938), (4478, 220810), (6220, 158969), (8956, 110405), (11195, 88324), (22081, 44780), (22390, 44162)]