21540860

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{179}}^1\times {\mathrm{547}}^1$

素因数の和:746

約数の個数: 48

約数和(自身を含む): 49714560

約数和(自身を除く): 28173700

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 110, 179, 220, 358, 547, 716, 895, 1094, 1790, 1969, 2188, 2735, 3580, 3938, 5470, 6017, 7876, 9845, 10940, 12034, 19690, 24068, 30085, 39380, 60170, 97913, 120340, 195826, 391652, 489565, 979130, 1077043, 1958260, 2154086, 4308172, 5385215, 10770430, 21540860]

約数ペア:

[(1, 21540860), (2, 10770430), (4, 5385215), (5, 4308172), (10, 2154086), (11, 1958260), (20, 1077043), (22, 979130), (44, 489565), (55, 391652), (110, 195826), (179, 120340), (220, 97913), (358, 60170), (547, 39380), (716, 30085), (895, 24068), (1094, 19690), (1790, 12034), (1969, 10940), (2188, 9845), (2735, 7876), (3580, 6017), (3938, 5470)]