20112020

素因数分解:

$2^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{149}}^1\times {\mathrm{397}}^1$

素因数の和:572

約数の個数: 48

約数和(自身を含む): 45133200

約数和(自身を除く): 25021180

約数列:

[1, 2, 4, 5, 10, 17, 20, 34, 68, 85, 149, 170, 298, 340, 397, 596, 745, 794, 1490, 1588, 1985, 2533, 2980, 3970, 5066, 6749, 7940, 10132, 12665, 13498, 25330, 26996, 33745, 50660, 59153, 67490, 118306, 134980, 236612, 295765, 591530, 1005601, 1183060, 2011202, 4022404, 5028005, 10056010, 20112020]

約数ペア:

[(1, 20112020), (2, 10056010), (4, 5028005), (5, 4022404), (10, 2011202), (17, 1183060), (20, 1005601), (34, 591530), (68, 295765), (85, 236612), (149, 134980), (170, 118306), (298, 67490), (340, 59153), (397, 50660), (596, 33745), (745, 26996), (794, 25330), (1490, 13498), (1588, 12665), (1985, 10132), (2533, 7940), (2980, 6749), (3970, 5066)]