21839055

素因数分解:

$3^1\times 5^1\times 7^2\times {\mathrm{43}}^1\times {\mathrm{691}}^1$

素因数の和:756

約数の個数: 48

約数和(自身を含む): 41652864

約数和(自身を除く): 19813809

約数列:

[1, 3, 5, 7, 15, 21, 35, 43, 49, 105, 129, 147, 215, 245, 301, 645, 691, 735, 903, 1505, 2073, 2107, 3455, 4515, 4837, 6321, 10365, 10535, 14511, 24185, 29713, 31605, 33859, 72555, 89139, 101577, 148565, 169295, 207991, 445695, 507885, 623973, 1039955, 1455937, 3119865, 4367811, 7279685, 21839055]

約数ペア:

[(1, 21839055), (3, 7279685), (5, 4367811), (7, 3119865), (15, 1455937), (21, 1039955), (35, 623973), (43, 507885), (49, 445695), (105, 207991), (129, 169295), (147, 148565), (215, 101577), (245, 89139), (301, 72555), (645, 33859), (691, 31605), (735, 29713), (903, 24185), (1505, 14511), (2073, 10535), (2107, 10365), (3455, 6321), (4515, 4837)]