20518890

素因数分解:

$2^1\times 3^1\times 5^1\times 7^1\times {\mathrm{199}}^1\times {\mathrm{491}}^1$

素因数の和:707

約数の個数: 64

約数和(自身を含む): 56678400

約数和(自身を除く): 36159510

約数列:

[1, 2, 3, 5, 6, 7, 10, 14, 15, 21, 30, 35, 42, 70, 105, 199, 210, 398, 491, 597, 982, 995, 1194, 1393, 1473, 1990, 2455, 2786, 2946, 2985, 3437, 4179, 4910, 5970, 6874, 6965, 7365, 8358, 10311, 13930, 14730, 17185, 20622, 20895, 34370, 41790, 51555, 97709, 103110, 195418, 293127, 488545, 586254, 683963, 977090, 1367926, 1465635, 2051889, 2931270, 3419815, 4103778, 6839630, 10259445, 20518890]

約数ペア:

[(1, 20518890), (2, 10259445), (3, 6839630), (5, 4103778), (6, 3419815), (7, 2931270), (10, 2051889), (14, 1465635), (15, 1367926), (21, 977090), (30, 683963), (35, 586254), (42, 488545), (70, 293127), (105, 195418), (199, 103110), (210, 97709), (398, 51555), (491, 41790), (597, 34370), (982, 20895), (995, 20622), (1194, 17185), (1393, 14730), (1473, 13930), (1990, 10311), (2455, 8358), (2786, 7365), (2946, 6965), (2985, 6874), (3437, 5970), (4179, 4910)]