20994490

素因数分解:

$2^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{103}}^1\times {\mathrm{109}}^1$

素因数の和:247

約数の個数: 64

約数和(自身を含む): 44478720

約数和(自身を除く): 23484230

約数列:

[1, 2, 5, 10, 11, 17, 22, 34, 55, 85, 103, 109, 110, 170, 187, 206, 218, 374, 515, 545, 935, 1030, 1090, 1133, 1199, 1751, 1853, 1870, 2266, 2398, 3502, 3706, 5665, 5995, 8755, 9265, 11227, 11330, 11990, 17510, 18530, 19261, 20383, 22454, 38522, 40766, 56135, 96305, 101915, 112270, 123497, 190859, 192610, 203830, 246994, 381718, 617485, 954295, 1234970, 1908590, 2099449, 4198898, 10497245, 20994490]

約数ペア:

[(1, 20994490), (2, 10497245), (5, 4198898), (10, 2099449), (11, 1908590), (17, 1234970), (22, 954295), (34, 617485), (55, 381718), (85, 246994), (103, 203830), (109, 192610), (110, 190859), (170, 123497), (187, 112270), (206, 101915), (218, 96305), (374, 56135), (515, 40766), (545, 38522), (935, 22454), (1030, 20383), (1090, 19261), (1133, 18530), (1199, 17510), (1751, 11990), (1853, 11330), (1870, 11227), (2266, 9265), (2398, 8755), (3502, 5995), (3706, 5665)]