21688452

素因数分解:

$2^2\times 3^3\times {\mathrm{409}}^1\times {\mathrm{491}}^1$

素因数の和:913

約数の個数: 48

約数和(自身を含む): 56481600

約数和(自身を除く): 34793148

約数列:

[1, 2, 3, 4, 6, 9, 12, 18, 27, 36, 54, 108, 409, 491, 818, 982, 1227, 1473, 1636, 1964, 2454, 2946, 3681, 4419, 4908, 5892, 7362, 8838, 11043, 13257, 14724, 17676, 22086, 26514, 44172, 53028, 200819, 401638, 602457, 803276, 1204914, 1807371, 2409828, 3614742, 5422113, 7229484, 10844226, 21688452]

約数ペア:

[(1, 21688452), (2, 10844226), (3, 7229484), (4, 5422113), (6, 3614742), (9, 2409828), (12, 1807371), (18, 1204914), (27, 803276), (36, 602457), (54, 401638), (108, 200819), (409, 53028), (491, 44172), (818, 26514), (982, 22086), (1227, 17676), (1473, 14724), (1636, 13257), (1964, 11043), (2454, 8838), (2946, 7362), (3681, 5892), (4419, 4908)]