2778889780

素因数分解:

$2^2\times 5^1\times {\mathrm{79}}^1\times {\mathrm{541}}^1\times {\mathrm{3251}}^1$

素因数の和:3880

約数の個数: 48

約数和(自身を含む): 5922282240

約数和(自身を除く): 3143392460

約数列:

[1, 2, 4, 5, 10, 20, 79, 158, 316, 395, 541, 790, 1082, 1580, 2164, 2705, 3251, 5410, 6502, 10820, 13004, 16255, 32510, 42739, 65020, 85478, 170956, 213695, 256829, 427390, 513658, 854780, 1027316, 1284145, 1758791, 2568290, 3517582, 5136580, 7035164, 8793955, 17587910, 35175820, 138944489, 277888978, 555777956, 694722445, 1389444890, 2778889780]

約数ペア:

[(1, 2778889780), (2, 1389444890), (4, 694722445), (5, 555777956), (10, 277888978), (20, 138944489), (79, 35175820), (158, 17587910), (316, 8793955), (395, 7035164), (541, 5136580), (790, 3517582), (1082, 2568290), (1580, 1758791), (2164, 1284145), (2705, 1027316), (3251, 854780), (5410, 513658), (6502, 427390), (10820, 256829), (13004, 213695), (16255, 170956), (32510, 85478), (42739, 65020)]