20853210

素因数分解:

$2^1\times 3^1\times 5^1\times 7^1\times {\mathrm{199}}^1\times {\mathrm{499}}^1$

素因数の和:715

約数の個数: 64

約数和(自身を含む): 57600000

約数和(自身を除く): 36746790

約数列:

[1, 2, 3, 5, 6, 7, 10, 14, 15, 21, 30, 35, 42, 70, 105, 199, 210, 398, 499, 597, 995, 998, 1194, 1393, 1497, 1990, 2495, 2786, 2985, 2994, 3493, 4179, 4990, 5970, 6965, 6986, 7485, 8358, 10479, 13930, 14970, 17465, 20895, 20958, 34930, 41790, 52395, 99301, 104790, 198602, 297903, 496505, 595806, 695107, 993010, 1390214, 1489515, 2085321, 2979030, 3475535, 4170642, 6951070, 10426605, 20853210]

約数ペア:

[(1, 20853210), (2, 10426605), (3, 6951070), (5, 4170642), (6, 3475535), (7, 2979030), (10, 2085321), (14, 1489515), (15, 1390214), (21, 993010), (30, 695107), (35, 595806), (42, 496505), (70, 297903), (105, 198602), (199, 104790), (210, 99301), (398, 52395), (499, 41790), (597, 34930), (995, 20958), (998, 20895), (1194, 17465), (1393, 14970), (1497, 13930), (1990, 10479), (2495, 8358), (2786, 7485), (2985, 6986), (2994, 6965), (3493, 5970), (4179, 4990)]