20742820

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{229}}^1\times {\mathrm{647}}^1$

素因数の和:892

約数の個数: 48

約数和(自身を含む): 50077440

約数和(自身を除く): 29334620

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 229, 458, 647, 916, 1145, 1294, 1603, 2290, 2588, 3206, 3235, 4529, 4580, 6412, 6470, 8015, 9058, 12940, 16030, 18116, 22645, 32060, 45290, 90580, 148163, 296326, 592652, 740815, 1037141, 1481630, 2074282, 2963260, 4148564, 5185705, 10371410, 20742820]

約数ペア:

[(1, 20742820), (2, 10371410), (4, 5185705), (5, 4148564), (7, 2963260), (10, 2074282), (14, 1481630), (20, 1037141), (28, 740815), (35, 592652), (70, 296326), (140, 148163), (229, 90580), (458, 45290), (647, 32060), (916, 22645), (1145, 18116), (1294, 16030), (1603, 12940), (2290, 9058), (2588, 8015), (3206, 6470), (3235, 6412), (4529, 4580)]