21103720

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{47963}}^1$

素因数の和:47985

約数の個数: 32

約数和(自身を含む): 51801120

約数和(自身を除く): 30697400

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 40, 44, 55, 88, 110, 220, 440, 47963, 95926, 191852, 239815, 383704, 479630, 527593, 959260, 1055186, 1918520, 2110372, 2637965, 4220744, 5275930, 10551860, 21103720]

約数ペア:

[(1, 21103720), (2, 10551860), (4, 5275930), (5, 4220744), (8, 2637965), (10, 2110372), (11, 1918520), (20, 1055186), (22, 959260), (40, 527593), (44, 479630), (55, 383704), (88, 239815), (110, 191852), (220, 95926), (440, 47963)]