28719500

素因数分解:

$2^2\times 5^3\times {\mathrm{71}}^1\times {\mathrm{809}}^1$

素因数の和:899

約数の個数: 48

約数和(自身を含む): 63685440

約数和(自身を除く): 34965940

約数列:

[1, 2, 4, 5, 10, 20, 25, 50, 71, 100, 125, 142, 250, 284, 355, 500, 710, 809, 1420, 1618, 1775, 3236, 3550, 4045, 7100, 8090, 8875, 16180, 17750, 20225, 35500, 40450, 57439, 80900, 101125, 114878, 202250, 229756, 287195, 404500, 574390, 1148780, 1435975, 2871950, 5743900, 7179875, 14359750, 28719500]

約数ペア:

[(1, 28719500), (2, 14359750), (4, 7179875), (5, 5743900), (10, 2871950), (20, 1435975), (25, 1148780), (50, 574390), (71, 404500), (100, 287195), (125, 229756), (142, 202250), (250, 114878), (284, 101125), (355, 80900), (500, 57439), (710, 40450), (809, 35500), (1420, 20225), (1618, 17750), (1775, 16180), (3236, 8875), (3550, 8090), (4045, 7100)]