81016880

素因数分解:

$2^4\times 5^1\times 7^1\times {\mathrm{199}}^1\times {\mathrm{727}}^1$

素因数の和:946

約数の個数: 80

約数和(自身を含む): 216652800

約数和(自身を除く): 135635920

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 35, 40, 56, 70, 80, 112, 140, 199, 280, 398, 560, 727, 796, 995, 1393, 1454, 1592, 1990, 2786, 2908, 3184, 3635, 3980, 5089, 5572, 5816, 6965, 7270, 7960, 10178, 11144, 11632, 13930, 14540, 15920, 20356, 22288, 25445, 27860, 29080, 40712, 50890, 55720, 58160, 81424, 101780, 111440, 144673, 203560, 289346, 407120, 578692, 723365, 1012711, 1157384, 1446730, 2025422, 2314768, 2893460, 4050844, 5063555, 5786920, 8101688, 10127110, 11573840, 16203376, 20254220, 40508440, 81016880]

約数ペア:

[(1, 81016880), (2, 40508440), (4, 20254220), (5, 16203376), (7, 11573840), (8, 10127110), (10, 8101688), (14, 5786920), (16, 5063555), (20, 4050844), (28, 2893460), (35, 2314768), (40, 2025422), (56, 1446730), (70, 1157384), (80, 1012711), (112, 723365), (140, 578692), (199, 407120), (280, 289346), (398, 203560), (560, 144673), (727, 111440), (796, 101780), (995, 81424), (1393, 58160), (1454, 55720), (1592, 50890), (1990, 40712), (2786, 29080), (2908, 27860), (3184, 25445), (3635, 22288), (3980, 20356), (5089, 15920), (5572, 14540), (5816, 13930), (6965, 11632), (7270, 11144), (7960, 10178)]