20162420

素因数分解:

$2^2\times 5^1\times {\mathrm{19}}^1\times {\mathrm{97}}^1\times {\mathrm{547}}^1$

素因数の和:672

約数の個数: 48

約数和(自身を含む): 45111360

約数和(自身を除く): 24948940

約数列:

[1, 2, 4, 5, 10, 19, 20, 38, 76, 95, 97, 190, 194, 380, 388, 485, 547, 970, 1094, 1843, 1940, 2188, 2735, 3686, 5470, 7372, 9215, 10393, 10940, 18430, 20786, 36860, 41572, 51965, 53059, 103930, 106118, 207860, 212236, 265295, 530590, 1008121, 1061180, 2016242, 4032484, 5040605, 10081210, 20162420]

約数ペア:

[(1, 20162420), (2, 10081210), (4, 5040605), (5, 4032484), (10, 2016242), (19, 1061180), (20, 1008121), (38, 530590), (76, 265295), (95, 212236), (97, 207860), (190, 106118), (194, 103930), (380, 53059), (388, 51965), (485, 41572), (547, 36860), (970, 20786), (1094, 18430), (1843, 10940), (1940, 10393), (2188, 9215), (2735, 7372), (3686, 5470)]