21449940

素因数分解:

$2^2\times 3^1\times 5^1\times {\mathrm{131}}^1\times {\mathrm{2729}}^1$

素因数の和:2872

約数の個数: 48

約数和(自身を含む): 60540480

約数和(自身を除く): 39090540

約数列:

[1, 2, 3, 4, 5, 6, 10, 12, 15, 20, 30, 60, 131, 262, 393, 524, 655, 786, 1310, 1572, 1965, 2620, 2729, 3930, 5458, 7860, 8187, 10916, 13645, 16374, 27290, 32748, 40935, 54580, 81870, 163740, 357499, 714998, 1072497, 1429996, 1787495, 2144994, 3574990, 4289988, 5362485, 7149980, 10724970, 21449940]

約数ペア:

[(1, 21449940), (2, 10724970), (3, 7149980), (4, 5362485), (5, 4289988), (6, 3574990), (10, 2144994), (12, 1787495), (15, 1429996), (20, 1072497), (30, 714998), (60, 357499), (131, 163740), (262, 81870), (393, 54580), (524, 40935), (655, 32748), (786, 27290), (1310, 16374), (1572, 13645), (1965, 10916), (2620, 8187), (2729, 7860), (3930, 5458)]