20254220

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{199}}^1\times {\mathrm{727}}^1$

素因数の和:942

約数の個数: 48

約数和(自身を含む): 48921600

約数和(自身を除く): 28667380

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 199, 398, 727, 796, 995, 1393, 1454, 1990, 2786, 2908, 3635, 3980, 5089, 5572, 6965, 7270, 10178, 13930, 14540, 20356, 25445, 27860, 50890, 101780, 144673, 289346, 578692, 723365, 1012711, 1446730, 2025422, 2893460, 4050844, 5063555, 10127110, 20254220]

約数ペア:

[(1, 20254220), (2, 10127110), (4, 5063555), (5, 4050844), (7, 2893460), (10, 2025422), (14, 1446730), (20, 1012711), (28, 723365), (35, 578692), (70, 289346), (140, 144673), (199, 101780), (398, 50890), (727, 27860), (796, 25445), (995, 20356), (1393, 14540), (1454, 13930), (1990, 10178), (2786, 7270), (2908, 6965), (3635, 5572), (3980, 5089)]