21696540

素因数分解:

$2^2\times 3^1\times 5^1\times {\mathrm{431}}^1\times {\mathrm{839}}^1$

素因数の和:1282

約数の個数: 48

約数和(自身を含む): 60963840

約数和(自身を除く): 39267300

約数列:

[1, 2, 3, 4, 5, 6, 10, 12, 15, 20, 30, 60, 431, 839, 862, 1293, 1678, 1724, 2155, 2517, 2586, 3356, 4195, 4310, 5034, 5172, 6465, 8390, 8620, 10068, 12585, 12930, 16780, 25170, 25860, 50340, 361609, 723218, 1084827, 1446436, 1808045, 2169654, 3616090, 4339308, 5424135, 7232180, 10848270, 21696540]

約数ペア:

[(1, 21696540), (2, 10848270), (3, 7232180), (4, 5424135), (5, 4339308), (6, 3616090), (10, 2169654), (12, 1808045), (15, 1446436), (20, 1084827), (30, 723218), (60, 361609), (431, 50340), (839, 25860), (862, 25170), (1293, 16780), (1678, 12930), (1724, 12585), (2155, 10068), (2517, 8620), (2586, 8390), (3356, 6465), (4195, 5172), (4310, 5034)]