21057540

素因数分解:

$2^2\times 3^1\times 5^1\times 7^1\times {\mathrm{181}}^1\times {\mathrm{277}}^1$

素因数の和:477

約数の個数: 96

約数和(自身を含む): 68001024

約数和(自身を除く): 46943484

約数列:

[1, 2, 3, 4, 5, 6, 7, 10, 12, 14, 15, 20, 21, 28, 30, 35, 42, 60, 70, 84, 105, 140, 181, 210, 277, 362, 420, 543, 554, 724, 831, 905, 1086, 1108, 1267, 1385, 1662, 1810, 1939, 2172, 2534, 2715, 2770, 3324, 3620, 3801, 3878, 4155, 5068, 5430, 5540, 5817, 6335, 7602, 7756, 8310, 9695, 10860, 11634, 12670, 15204, 16620, 19005, 19390, 23268, 25340, 29085, 38010, 38780, 50137, 58170, 76020, 100274, 116340, 150411, 200548, 250685, 300822, 350959, 501370, 601644, 701918, 752055, 1002740, 1052877, 1403836, 1504110, 1754795, 2105754, 3008220, 3509590, 4211508, 5264385, 7019180, 10528770, 21057540]

約数ペア:

[(1, 21057540), (2, 10528770), (3, 7019180), (4, 5264385), (5, 4211508), (6, 3509590), (7, 3008220), (10, 2105754), (12, 1754795), (14, 1504110), (15, 1403836), (20, 1052877), (21, 1002740), (28, 752055), (30, 701918), (35, 601644), (42, 501370), (60, 350959), (70, 300822), (84, 250685), (105, 200548), (140, 150411), (181, 116340), (210, 100274), (277, 76020), (362, 58170), (420, 50137), (543, 38780), (554, 38010), (724, 29085), (831, 25340), (905, 23268), (1086, 19390), (1108, 19005), (1267, 16620), (1385, 15204), (1662, 12670), (1810, 11634), (1939, 10860), (2172, 9695), (2534, 8310), (2715, 7756), (2770, 7602), (3324, 6335), (3620, 5817), (3801, 5540), (3878, 5430), (4155, 5068)]