20502020

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{13313}}^1$

素因数の和:13340

約数の個数: 48

約数和(自身を含む): 53682048

約数和(自身を除く): 33180028

約数列:

[1, 2, 4, 5, 7, 10, 11, 14, 20, 22, 28, 35, 44, 55, 70, 77, 110, 140, 154, 220, 308, 385, 770, 1540, 13313, 26626, 53252, 66565, 93191, 133130, 146443, 186382, 266260, 292886, 372764, 465955, 585772, 732215, 931910, 1025101, 1464430, 1863820, 2050202, 2928860, 4100404, 5125505, 10251010, 20502020]

約数ペア:

[(1, 20502020), (2, 10251010), (4, 5125505), (5, 4100404), (7, 2928860), (10, 2050202), (11, 1863820), (14, 1464430), (20, 1025101), (22, 931910), (28, 732215), (35, 585772), (44, 465955), (55, 372764), (70, 292886), (77, 266260), (110, 186382), (140, 146443), (154, 133130), (220, 93191), (308, 66565), (385, 53252), (770, 26626), (1540, 13313)]